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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 KavanaughSupreme Court confounding its partisan critics Gorsuch, Thomas join liberal justices in siding with criminal defendant Alyssa Milano says she could 'potentially run' for House in 2024 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 HeitkampEffective and profitable climate solutions are within the nation's farms and forests Bill Maher blasts removal of journalist at Teen Vogue Centrist Democrats pose major problem for progressives MORE (D) has seen Republican Rep. Kevin CramerKevin John CramerTrump dismisses climate change, calls on Biden to fire joint chiefs Putin says Nord Stream 2 pipeline nearing completion Overnight Defense: Senate confirms Army secretary after snafu | Afghanistan withdrawal 'slightly' ahead of schedule MORE pull ahead in polls. They also believe they can defeat Sen. Claire McCaskillClaire Conner McCaskillThe Hill's Morning Report - Presented by Uber - Jan. 6 commission vote delayed; infrastructure debate lingers into June Missouri Republicans move to block Greitens in key Senate race Democratic Kansas City, Mo., mayor eyes Senate run 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 McSallyMcGuire unveils Arizona Senate campaign On The Trail: Arizona is microcosm of battle for the GOP Gabby Giffords and Mark Kelly welcome first grandchild 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 FlakeOn The Trail: Arizona is microcosm of battle for the GOP Trump looms large over fractured Arizona GOP Why Republican politicians are sticking with Trump 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 Heller9 Senate seats most likely to flip in 2022 On The Trail: Democrats plan to hammer Trump on Social Security, Medicare Lobbying World MORE (R-Nev.) ahead of his Democratic challenger, Rep. Jacky RosenJacklyn (Jacky) Sheryl RosenProgressives want to tighten screws beyond Manchin and Sinema Infighting grips Nevada Democrats ahead of midterms 9 Senate seats most likely to flip in 2022 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 ManchinJoe ManchinMaher goes after Manchin: 'Most powerful Republican in the Senate' It's not just Manchin: No electoral mandate stalls Democrats' leftist agenda Progressives want to tighten screws beyond Manchin and Sinema 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 ClintonTrump asks Biden to give Putin his 'warmest regards' Huma Abedin announces book deal Mystery surrounds Justice's pledge on journalist records 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) MenendezSanders drops bid to block Biden's Israel arms sale Sanders push to block arms sale to Israel doomed in Senate Schumer tactics on China bill reveal broader trade strategy 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 CruzBiden tries to erase Trump's 'America First' on world stage Cotton, Pentagon chief tangle over diversity training in military GOP senators press Justice Department to compare protest arrests to Capitol riot 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 BlackburnFauci on Blackburn video: 'No idea what she is talking about' Pentagon report clears use of drones made by top Chinese manufacturer Military families should not have to endure food insecurity 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 NelsonDemings raises million after announcing Senate bid against Rubio Russia threatens to leave International Space Station program over US sanctions Nikki Fried, only statewide elected Democrat in Florida, launches challenge to DeSantis 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.”