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 KavanaughAnticipation builds for final Supreme Court rulings Anticipation builds for final Supreme Court rulings Trump throws support behind 'no brainer' measure to ban burning of American flag 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 HeitkampLobbying World Pro-trade group targets Democratic leadership in push for new NAFTA On The Money: Stocks sink on Trump tariff threat | GOP caught off guard by new trade turmoil | Federal deficit grew 38 percent this fiscal year | Banks avoid taking position in Trump, Dem subpoena fight MORE (D) has seen Republican Rep. Kevin CramerKevin John CramerThe Hill's Morning Report — Trump pushes Mexico for 'significantly more' as tariffs loom The Hill's Morning Report — Trump pushes Mexico for 'significantly more' as tariffs loom Overnight Health Care: Liberals rip Democratic leaders for writing drug pricing bill in secret | Dems demand answers from company that shelters migrant kids | Measles cases top 1,000 MORE pull ahead in polls. They also believe they can defeat Sen. Claire McCaskillClaire Conner McCaskillConservatives spark threat of bloody GOP primaries Congress needs to work to combat the poverty, abuse and neglect issues that children face Lobbying world 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 McSallyDemocrats' 2020 Achilles's heel: The Senate Democrats' 2020 Achilles's heel: The Senate Democratic challenger to Susan Collins announces Senate bid 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 FlakeDemocrats needle GOP on standing up to Trump Democrats needle GOP on standing up to Trump Amash gets standing ovation at first town hall after calling for Trump's impeachment 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 HellerThis week: Barr back in hot seat over Mueller report Trump suggests Heller lost reelection bid because he was 'hostile' during 2016 presidential campaign Trump picks ex-oil lobbyist David Bernhardt for Interior secretary MORE (R-Nev.) ahead of his Democratic challenger, Rep. Jacky RosenJacklyn (Jacky) Sheryl RosenFemale senators hatch plan to 'shame' Senate into voting faster Female senators hatch plan to 'shame' Senate into voting faster Lawmakers introduce legislation to improve cyber workforce funding 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) ManchinThe Hill's 12:30 Report — Presented by MAPRx — Trump takes heat for remarks on help from foreign governments The Hill's 12:30 Report — Presented by MAPRx — Trump takes heat for remarks on help from foreign governments The Hill's Morning Report - Trump and House Democrats resume battle 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 ClintonDemocrats' 2020 Achilles's heel: The Senate Democrats' 2020 Achilles's heel: The Senate House Intel Republican: 'Foolish' not to take info on opponent from foreign ally 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) MenendezThere is a severe physician shortage and it will only worsen Democrats ask Fed to probe Trump's Deutsche Bank ties Ending the Cyprus arms embargo will increase tensions in the Eastern Mediterranean 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 CruzCruz, Ocasio-Cortez efforts on birth control access face major obstacles Ocasio-Cortez and Cruz's dialogue shows common ground isn't just for moderates Ted Cruz, AOC have it right on banning former members of Congress from becoming lobbyists 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 BlackburnElection security bills face GOP buzzsaw Election security bills face GOP buzzsaw Trump puts GOP in tough spot with remarks on foreign 'dirt' 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 NelsonHow Jim Bridenstine recruited an old enemy to advise NASA Republicans amp up attacks on Tlaib's Holocaust comments The muscle for digital payment 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.”