GOP sees new hope to expand Senate majority

Republicans are increasingly optimistic about their chances of expanding their narrow Senate majority after the polarizing confirmation battle over Supreme Court Justice Brett KavanaughBrett Michael KavanaughCollins walks impeachment tightrope Supreme Court sharply divided over state aid for religious schools How Citizens United altered America's political landscape MORE.

In the weeks since a series of sexual misconduct allegations were raised against Kavanaugh, the GOP has seen candidates in the Republican strongholds of Texas and Tennessee strengthen their positions, putting possible upset bids by Democrats on hold.

Republicans are increasingly bullish on their chances of gaining a seat in North Dakota, where Sen. Heidi HeitkampMary (Heidi) Kathryn HeitkampSusan Collins set to play pivotal role in impeachment drama Pro-trade group launches media buy as Trump and Democrats near deal on new NAFTA The Hill's Morning Report — Biden steadies in third debate as top tier remains the same MORE (D) has seen Republican Rep. Kevin CramerKevin John CramerThe Hill's Morning Report - House prosecutes Trump as 'lawless,' 'corrupt' Collins walks impeachment tightrope Senate Republicans muscle through rules for Trump trial MORE pull ahead in polls. They also believe they can defeat Sen. Claire McCaskillClaire Conner McCaskillHow Citizens United altered America's political landscape #MidnightMoscowMitch trends amid criticism of McConnell's proposed impeachment trial rules The most expensive congressional races of the last decade MORE (D) in Missouri. Both Democrats voted against Kavanaugh's confirmation.

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“If you look at the polling we’ve seen in the last four or five days, it’s become clear that states like North Dakota and Missouri are moving in the Republicans’ direction,” said Matt Mackowiak, a GOP strategist.

“Most importantly, the opportunity that existed for Democrats in Tennessee and Texas looks like it's on the way out,” he said.

In Arizona and Nevada, widely seen as the best pickup opportunities for Democrats, recent polls suggest that the GOP is holding its own.

One poll released Wednesday by Phoenix-based pollster OH Predictive Insights showed Rep. Kyrsten Sinema (D-Ariz.) trailing Rep. Martha McSallyMartha Elizabeth McSallyHow Citizens United altered America's political landscape McConnell keeps press in check as impeachment trial starts Progressive group launches campaign targeting vulnerable GOP senators on impeachment MORE (R-Ariz.) by 6 points.

While most other recent polls show Sinema with a narrow lead, the race to succeed retiring Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeThe Hill's 12:30 Report: House managers to begin opening arguments on day two Flake: Republicans don't speak out against Trump 'because they want to keep their jobs' GOP senator calls CNN reporter a 'liberal hack' when asked about Parnas materials MORE (R-Ariz.) appears to be tightening. A Fox News poll conducted around the same time as the OH Predictive Insights survey showed Sinema ahead by 2 points – well within the poll’s 3.5-point margin of error.

In Nevada, an NBC News/Marist poll released earlier this month put Sen. Dean HellerDean Arthur HellerLobbying World Democrats spend big to put Senate in play This week: Barr back in hot seat over Mueller report MORE (R-Nev.) ahead of his Democratic challenger, Rep. Jacky RosenJacklyn (Jacky) Sheryl RosenSenate confirms Trump's 50th circuit judge, despite 'not qualified' rating Hillicon Valley: Facebook to remove mentions of potential whistleblower's name | House Dems demand FCC action over leak of location data | Dem presses regulators to secure health care data Senators introduce bill to create 'parity' among broadband programs MORE (Nev.), by 2 points. Heller has long been seen as the most vulnerable GOP Senate incumbent.

“I think Senate races are tightening and that’s not a real surprise,” said Doug Thornell, a former deputy political director for the Democratic Senatorial Campaign Committee (DSCC). “As you get closer to an election, that typically happens. There’s more information that voters take in and on both sides see enthusiasm grow.”

The GOP’s best chances for picking up seats look to be in North Dakota and Missouri, but the party also sees opportunities in Montana and Indiana, two states Trump won easily in 2016, as well as Florida, another state won by Trump where Republicans have a strong candidate in Gov. Rick Scott.

West Virginia is another pick-up chance, though Sen. Joe ManchinJoseph (Joe) ManchinTrump's trial a major test for McConnell, Schumer Poll: West Virginia voters would view Manchin negatively if he votes to convict Trump Pelosi set to send impeachment articles to the Senate next week MORE, the only Democrat to vote to confirm Kavanaugh, is holding on strong in polls. The Cook Political Report moved that race into the “Lean Democratic” column last month.

Republicans also see a longshot chance of flipping New Jersey, a deep-blue state that Hillary ClintonHillary Diane Rodham ClintonCollins walks impeachment tightrope Hill.TV's Saagar Enjeti rips Sanders for 'inability to actually fight with bad actors' in party Hill.TV's Krystal Ball knocks Clinton's 'mean girl' comments against Sanders MORE carried by 14 points in 2016.

A Stockton University poll released earlier this month showed a statistical dead heat in the race between Sen. Bob MenendezRobert (Bob) MenendezMedia's selective outrage exposed in McSally-Raju kerfuffle Dem senators say Iran threat to embassies not mentioned in intelligence briefing Overnight Defense: Iran crisis eases as Trump says Tehran 'standing down' | Dems unconvinced on evidence behind Soleimani strike | House sets Thursday vote on Iran war powers MORE (D) and his Republican challenger Bob Hugin, with the incumbent Democrat carrying only a 2-point lead. Menendez was reprimanded by a Senate ethics panel in April after federal prosecutors dropped corruption charges against him.

Republican officials and operatives argued that the bitter fight over Kavanaugh’s confirmation has boosted their chances. They are hoping that the fight will energize their base in November in a year when Democrats have largely held an edge in voter enthusiasm.

At the same time, they say they are not taking anything for granted, and acknowledge the political winds can change quickly.

In North Dakota, they say it’s still possible Heitkamp could make a late comeback.

“Heidi’s never going to be done for,” one North Dakota Republican operative said. “Part of that is this state is cheap. A little bit of money can have a lot of impact. She’s a fighter, and she’s got nothing left to lose.”

In Missouri, a recent poll from Fox news showed Attorney General Josh Hawley (R) tied at 46 percent with McCaskill. A CNN poll conducted days earlier gave McCaskill a 3-point lead.

In Texas, Sen. Ted CruzRafael (Ted) Edward CruzWhat to watch for on Day 3 of Senate impeachment trial Democrats' impeachment case lands with a thud with GOP — but real audience is voters Restlessness, light rule-breaking and milk spotted on Senate floor as impeachment trial rolls on MORE’s (R) polling numbers are on the rise. Two recent surveys by Emerson College and CBS News/YouGov showed the conservative firebrand pulling ahead by 5 and 6 points, respectively, over Rep. Beto O’Rourke (D-Texas).

In Tennessee, Rep. Marsha BlackburnMarsha BlackburnTaylor Swift talks politics, her new song: 'I wrote it after the midterm elections' GOP senator: 2020 candidates must recuse themselves from impeachment trial Apple under pressure to unlock Pensacola shooter's phones MORE (R) held a 5-point lead in a Fox News poll earlier this month over former Tennessee Gov. Phil Bredesen. Another poll by CBS News/YouGov showed her ahead by 8 points.

In Florida, Sen. Bill NelsonClarence (Bill) William NelsonThe most expensive congressional races of the last decade Lobbying world Bottom Line MORE (D) has seen his numbers rebound in recent polls against Scott. Hurricane Michael, which hit the state on Wednesday, has introduced a new uncertainty to that race.

Democrats have expressed optimism that the partisan fight over Kavanaugh will pump up their base.

“I think the pathway to the majority was always going to be difficult for Democrats,” Thornell said. “This is one of the most treacherous Senate maps either party has had in years. But it’s still in play because our incumbents are running strong campaigns, and we have put the GOP on defense in four states.”