Election Day: An hour-by-hour viewer’s guide

For a solid hour on Tuesday, all eyes will be trained on Lexington, Ky., and its suburbs, where Rep. Andy BarrAndy BarrReclaiming the American Dream Powell, Mnuchin stress limits of current emergency lending programs McConnell holds 12-point lead over Democratic challenger McGrath: poll MORE (R) is running for reelection against retired Marine Lt. Col. Amy McGrath (D).

That’s because Kentucky closes its polling places at 6 p.m. local time — and Barr’s 6th District is the only competitive race based entirely within the Eastern time zone.

Here’s an hour-by-hour look at how Election Day will unfold, and what to watch as the polls close.

6 p.m. Eastern — The Canary in Coal Country

Barr represents a district that voted for President TrumpDonald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE by a 15-point margin in 2016 — but it’s a seat with Democratic roots, one long held by former Rep. Ben Chandler (D). If McGrath pulls off an early upset, Republicans are likely going to have a very bad night. But if Barr hangs on, as polling indicates, the GOP’s House majority is still in play.

7 p.m. — The First Hints

Six states close their polling places at 7 p.m., from liberal Vermont to conservative South Carolina, and the rest of Kentucky.

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Vote-counting will begin in two of the hottest races in the country: Georgia’s gubernatorial race, a fierce battle between Secretary of State Brian Kemp (R) and state House Minority Leader Stacey Abrams (D), and Indiana’s Senate race, where Sen. Joe DonnellyJoseph (Joe) Simon DonnellyHarris faces pivotal moment with Supreme Court battle Trump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court MORE (D) faces former state Rep. Mike Braun (R).

If Donnelly loses quickly, it would augur poorly for other red-state Democratic senators. But if he prevails, Sens. Claire McCaskillClaire Conner McCaskillMomentum growing among Republicans for Supreme Court vote before Election Day Democratic-linked group runs ads in Kansas GOP Senate primary Trump mocked for low attendance at rally MORE (D-Mo.) and Heidi HeitkampMary (Heidi) Kathryn HeitkampHarris faces pivotal moment with Supreme Court battle Centrists, progressives rally around Harris pick for VP 70 former senators propose bipartisan caucus for incumbents MORE (D-N.D.) may find reason for optimism.

In Virginia, voters in the Richmond suburbs and Norfolk will reveal some of the first hints of the size of the Democratic advantage in the House. GOP Reps. Scott TaylorScott William TaylorBottom line Bottom line Republican Scott Taylor wins Virginia primary, to face Elaine Luria in rematch MORE and Dave Brat have tough fights on their hands, and a Democrat is even making a run at outgoing Rep. Tom GarrettThomas (Tom) Alexander GarrettInternal poll shows neck-and-neck race brewing in Virginia House contest GOP congressman loses primary after officiating gay wedding Virginia GOP to pick House nominee after candidate misses filing deadline MORE’s (R) seat. If Democrats take two of those, the Republican majority is probably gone.

7:30 p.m. — A Blue Moon and a Blue Dog

Polls close in North Carolina, Ohio and West Virginia at this time. Two red-state Senate Democrats will see their fates decided: Sen. Sherrod BrownSherrod Campbell BrownHarris faces pivotal moment with Supreme Court battle Remote work poses state tax challenges Senate Democrats release report alleging Trump admin undermined fair housing policies MORE (Ohio) is likely to cruise to reelection, and Sen. Joe ManchinJoseph (Joe) ManchinManchin defends Supreme Court candidate Barrett: 'It's awful to bring in religion' The Hill's Morning Report - Sponsored by Facebook - Trump, GOP allies prepare for SCOTUS nomination this week Trump meets with potential Supreme Court pick Amy Coney Barrett at White House MORE (W.Va.) is favored to win, but in a much tighter race.

Democrats will get the first signs of their ability to flip Republican-held governorships across the Midwest when Ohio begins counting its ballots. Former state Attorney General Richard CordrayRichard Adams CordrayConsumer bureau revokes payday lending restrictions Supreme Court ruling could unleash new legal challenges to consumer bureau Supreme Court rules consumer bureau director can be fired at will MORE (D), who was later head of the Consumer Financial Protection Bureau in Washington, is fighting his successor, Mike DeWine (R), for the right to succeed term-limited Gov. John Kasich (R).

North Carolina experiences what they call a "blue moon" election, a rare year in which neither the governor nor a senator is on the ballot. That probably means lower turnout, but Democrats are running surprisingly strong races against Reps. George HoldingGeorge Edward Bell HoldingGOP lawmaker says US-UK negotiators working 'fast and furious' on trade deal Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Whiskey, workers and friends caught in the trade dispute crossfire MORE (R) and Ted BuddTheodore (Ted) Paul BuddHouse Dems introduce bill to require masks on planes and in airports Bipartisan bill introduced to require TSA to take temperature checks How to combat substance abuse during COVID-19 MORE (R), and for a seat held by Rep. Robert PittengerRobert Miller PittengerBottom Line North Carolina reporter says there could be 'new crop' of GOP candidates in 9th Congressional District race North Carolina board calls for new election in contested House race MORE (R), who lost his primary.

8 p.m. — The Big Enchilada

Sixteen states and the District of Columbia are done voting by 8 p.m. Eastern, including a handful of states that will give a fuller picture of the electorate’s mood.

Governor’s races will be decided in Alabama, Connecticut, Florida, Illinois, Maine, Maryland, Massachusetts, New Hampshire, Oklahoma, Pennsylvania, Rhode Island and Tennessee.

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The biggest prize for Democrats would be in Florida, scene of a nasty battle between Tallahassee Mayor Andrew Gillum (D) and former Rep. Ron DeSantisRon DeSantisFlorida attorney general scrutinizing Bloomberg paying fines for felons to vote Trump may meet with potential Supreme Court pick in Miami Florida governor unveils legislation targeting protesters in 'violent or disorderly' demonstrations MORE (R). In Connecticut, businessman Bob Stefanowski (R) is running a particularly tough race against progressive hero Ned Lamont (D). Expect Govs. Charlie Baker (R) of Massachusetts and Larry Hogan (R) of Maryland to win reelection easily, thanks to ticket-splitters who will also reelect Sens. Elizabeth WarrenElizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass.) and Ben CardinBenjamin (Ben) Louis CardinCongress must finish work on popular conservation bill before time runs out PPP application window closes after coronavirus talks deadlock  Congress eyes tighter restrictions on next round of small business help MORE (D-Md.).

Vote-counting also begins in key Senate races in Florida, Missouri, New Jersey, Pennsylvania and Tennessee. In Mississippi, expect Sen. Cindy Hyde-Smith (R) and former Agriculture Secretary Mike Espy (D) to head to a late November runoff.

The House battleground expands to Democratic targets in Florida, Illinois, Maine, New Hampshire, New Jersey, Oklahoma — where a PAC linked to former New York City Mayor Michael Bloomberg is making a late play against Rep. Steve RussellSteven (Steve) Dane RussellGOP women's group launches six-figure campaign for House candidate Bice Bice wins Oklahoma GOP runoff to face Horn in November House Democrats target Midwestern GOP seats MORE (R) — and Pennsylvania. Democrats are going to pick up a handful of seats in Pennsylvania, where the state Supreme Court ordered district maps redrawn earlier this year.

Voters in the District of Columbia are likely to reelect Mayor Muriel Bowser (D).

Delaware and Rhode Island start their vote counts at 8 p.m., too.

8:30 p.m. — The (French) Hill to Die On

Arkansas voters are likely to reelect Gov. Asa Hutchinson (R). The only truly competitive race here is in the state’s 2nd District, where Rep. French HillJames (French) French HillThe use and abuse of the IMF in the fight against COVID-19 Lawmakers ask Pelosi, McConnell to diversify coronavirus relief oversight panel Exclusive: Democrats seek to increase racial diversity of pandemic relief oversight board MORE (R) faces a tough challenge from state Rep. Clarke Tucker (D). Hill is likely to win reelection, but the district has Democratic roots: Hill’s predecessor took over for Rep. Vic Snyder, a Democrat who held the Little Rock-based seat for 14 years.

9 p.m. — Go West, Young Man

The first Mountain West states start to close at this time, along with most of the Midwest.

Voters in Arizona, Michigan, Minnesota, North Dakota, Texas and Wisconsin are electing senators. Democrats are hopeful that Rep. Kyrsten Sinema (D) can defeat a charging Rep. Martha McSallyMartha Elizabeth McSallyThe Hill's Campaign Report: Presidential polls tighten weeks out from Election Day Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' New ABC/WaPost poll finds Trump edging Biden in Arizona, Florida MORE (R) in Arizona, while Republicans believe Rep. Kevin CramerKevin John CramerMomentum growing among Republicans for Supreme Court vote before Election Day On Paycheck Protection Program, streamlined forgiveness is key McConnell shores up GOP support for coronavirus package MORE (R) will oust Heitkamp in North Dakota. And Sen. Ted CruzRafael (Ted) Edward CruzCruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes Press: Notorious RBG vs Notorious GOP MORE (R) has a leg up on Rep. Beto O’Rourke (D), despite the Democrat’s absolutely mammoth fundraising performance.

New governors will be elected in Colorado, Kansas, Michigan, Minnesota, New Mexico, South Dakota and Wyoming, all states where the incumbents are termed out. Wisconsin Gov. Scott Walker (R) is in the fight of his life, while Govs. Andrew Cuomo (D) of New York, Doug Ducey (R) of Arizona and Greg Abbott (R) of Texas are skating toward another term.

Democrats and Republicans are battling over House districts in Arizona, Kansas, Michigan, Minnesota, Nebraska, New Mexico, New York, Texas and Wisconsin.

Voters in Louisiana don’t have many competitive races to decide, but they shouldn’t feel left out: The race for governor in 2019 kicks off just as soon as the polls close on Tuesday.

10 p.m. — Defining the Wave

If a Democratic blue wave is forming, we’ll get a sense of how high it is when polls close in Iowa, Montana, Nevada and Utah.

Reps. Rod Blum (R) and David YoungDavid Edmund YoungEric Idle threatens to sue GOP committee over use of Monty Python song in ad Trump: DeJoy should be removed if it 'can be proven that he did something wrong' The Hill's 12:30 Report - Presented by Facebook - Trump's Labor Day news conference MORE (R) face stiff challenges in Iowa, and both could lose without a tremendous wave breaking. But what about GOP Rep. Steve KingSteven (Steve) Arnold KingTrump, Biden deadlocked in Iowa: poll GOP leader: 'There is no place for QAnon in the Republican Party' Loomer win creates bigger problem for House GOP MORE? While his district is much more conservative, King has become a lightning rod for associating himself with white supremacists across the country and around the world.

If Democrats are having a rough night in Senate races, this is the hour that will demonstrate just how bad it’s going: Their top target is Sen. Dean HellerDean Arthur HellerOn The Trail: Democrats plan to hammer Trump on Social Security, Medicare Lobbying World Democrats spend big to put Senate in play MORE (R-Nev.), who’s running even with Rep. Jacky RosenJacklyn (Jacky) Sheryl RosenHillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections Google, Apple, eBay to meet virtually with lawmakers for tech group's annual fly-in Senate Democrats demand answers on migrant child trafficking during pandemic MORE (D) in most polls. Democrats are defending Sen. Jon TesterJonathan (Jon) TesterDemocrats shoot down talk of expanding Supreme Court Pence seeks to boost Daines in critical Montana Senate race This World Suicide Prevention Day, let's recommit to protecting the lives of our veterans MORE (Mont.), who is in a surprisingly close and late-breaking race against state Auditor Matt Rosendale (R).

In Utah, Rep. Mia LoveLudmya (Mia) LoveFormer NFL player Burgess Owens wins Utah GOP primary The Hill's Campaign Report: The political heavyweights in Tuesday's primary fights The biggest political upsets of the decade MORE (R) finds herself in an unexpectedly tough battle; one poll shows her losing to Salt Lake County Mayor Ben McAdams (D).

11 p.m. — The Best Coast

Polls close in four of the five states that touch the Pacific Ocean, along with Idaho.

Voters in California and Idaho are electing new governors. California voters, especially those in the Central Valley and Orange County, will decide the fates of a handful of endangered House Republicans.

In Washington, voters will decide a hard-fought contest for a congressional seat being vacated by Rep. Dave ReichertDavid (Dave) George ReichertWashington Rep. Kim Schrier wins primary Mail ballot surge places Postal Service under spotlight Bottom Line MORE (R). If voters are really in the mood for change, Reps. Cathy McMorris RodgersCathy McMorris RodgersHillicon Valley: Trump backs potential Microsoft, TikTok deal, sets September deadline | House Republicans request classified TikTok briefing | Facebook labels manipulated Pelosi video Top House Republicans request classified TikTok briefing More than 100 lawmakers urge IRS to resolve stimulus payment issues MORE (R) and Jaime Herrera BeutlerJaime Lynn Herrera BeutlerCentrist Democrats 'strongly considering' discharge petition on GOP PPP bill This week: House returns for pre-election sprint GOP Rep. Jaime Herrera Beutler advances in Washington primary MORE (R) could also have uncomfortable nights — remember, no state kicked out more Democratic incumbents in the 1994 GOP wave than Washington.

Republicans have one more shot for an upset, this time in Oregon, where Gov. Kate Brown (D) is in a more difficult than expected battle for reelection.

Hawaii voters are likely to reelect Gov. David Ige (D) and send former Rep. Ed Case (D) back to Congress.

1 a.m. — The Aleutian Solution

The vast majority of polling places in Alaska close at midnight Eastern time, but seven hours after the first polls close in Kentucky, voters in parts of the Aleutian Islands will cast the final ballots of the 2018 general election.

Alaska voters will elect a new governor, after Gov. Bill Walker (I) dropped his reelection bid late last month. And one recent poll showed the dean of the House, Rep. Don YoungDonald (Don) Edwin YoungFlorida Democrat introduces bill to recognize Puerto Rico statehood referendum House Democratic campaign leader predicts bigger majority Young wins Alaska GOP House primary MORE (R), in trouble against education activist Alyse Galvin (D).