The death of Justice Antonin Scalia is throwing another curveball into the Republican battle to maintain control of the Senate.

Vulnerable senators were hoping to be able to focus on their records as the party defends 24 Senate seats in November.

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Instead, those senators have to make a choice: Pit themselves against the GOP presidential field by agreeing to take up President Obama’s nominee, or face attack ads suggesting they’re part of Washington’s “dysfunction” by fighting to keep the seat vacant.

With Republicans only able to lose a handful of seats and keep their majority, the path ahead is fraught with danger.

Up to now, the vulnerable lawmakers have tried to localize their reelections bid and avoid being dragged into the GOP infighting among the presidential field.

Republicans in blue-leaning states, in particular, have sought to stay above the presidential fray, with some wary of being tied too closely to Donald Trump.

But Democrats are seeking to link the Supreme Court and the presidential race in the minds of voters, suggesting the GOP’s refusal to take up Obama’s nominee puts them squarely in line with Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE and Trump.

“[Senate Republicans] prefer to delay, delay, delay until they elect a President Cruz or President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE who can nominate someone who supports their brand of extreme conservatism,” Amy Dacey, the CEO of the Democratic National Committee, wrote in a fundraising email.

Vice President Biden echoed her comments, telling MSNBC’s Rachel Maddow that the Senate GOP is “intimidated by the dominant element of the Republican Party, the national politics right now, the far right.”

Even before Scalia’s death, Republican senators were keeping a close eye on the voter frustration that Trump, Cruz and Democratic candidate Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE have tapped on the campaign trail.

Sen. John McCain John Sidney McCainThe electoral reality that the media ignores Kelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks MORE (R-Ariz.) told The Hill shortly before Scalia’s death that “anybody who is an incumbent who is running for reelection ought to be very concerned.”

The Arizona Republican — who faces both a primary challenge and competitive general election — quickly backed Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMcConnell focuses on confirming judicial nominees with COVID-19 talks stalled McConnell accuses Democrats of sowing division by 'downplaying progress' on election security Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE’s (R-Ky.) strategy of allowing the next president to fill the seat.

But GOP incumbents, currently dispersed across the country, are struggling to deliver a unified message.

At the center of it all is Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans signal openness to working with Biden Senators offer disaster tax relief bill Trump spikes political football with return of Big Ten season MORE, the chairman of the Judiciary Committee. The Iowa Republican, who is up for reelection, has told not ruled out holding a hearing for Obama’s nominee even as he has backed McConnell’s calls to keep the seat empty.

Grassley isn’t alone in sending mixed message.

Sen. Lisa Murkowski Lisa Ann MurkowskiGOP ramps up attacks on Democrats over talk of nixing filibuster OVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House Democrats tee up vote on climate-focused energy bill next week MORE (R-Alaska), who is also up for reelection, initially told Alaska reporters that the president’s nominee should get a hearing. She then backtracked late this week and said the president should “follow a tradition embraced by both parties and allow his successor to select the next Supreme Court justice.”

Sen. Ron Johnson Ronald (Ron) Harold JohnsonSecond GOP senator to quarantine after exposure to coronavirus GOP-led panel to hear from former official who said Burisma was not a factor in US policy The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks MORE (R-Wis.), in particular, has been slammed by Democrats and the media after expressing seemingly contradictory positions.

The Republican lawmaker, considered one of the Senate’s most vulnerable incumbents, told a local Wisconsin radio station that he thought the seat should be filled by the next president.

But, in the same interview, he said that he's "never said that we shouldn't vote" on a nominee, suggesting that decision rests with McConnell but also that "doing nothing is still an action."

The mixed messaging has delighted Democrats, who say the division among Republicans indicates they will eventually cave to pressure and take up Obama’s nominee.

Democrats are also taking swipes at GOP Sens. Kelly Ayotte Kelly Ann AyotteBottom line Bottom line Bottom Line MORE (N.H.), Rob Portman Robert (Rob) Jones PortmanRomney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery House passes B bill to boost Postal Service MORE (Ohio), Pat Toomey (Pa.) and Johnson — incumbents who are at the heart of the battle for the upper chamber. All of them have backed McConnell’s strategy.

Lauren Passalacqua, the national press secretary for the Democratic Senatorial Campaign Committee, said their stance represents “unprecedented obstruction” and that “voters will turn out in November to elect people who will actually do their jobs.”

But GOP incumbents have more to worry about than Democratic attacks, as any move to accept Obama’s nominee could invite a late primary challenge.

While 62 percent of people in a Fox News poll said they want the president and Congress to fill the court vacancy now, only 36 percent of Republican voters took that position.

Despite an onslaught of pressure from Democrats, Republican senators remain bullish that the Supreme Court won’t spill over their efforts to maintain the Senate majority in 2017.

“I don't think we’ll feel the pressure from certainly my constituents in Texas. I think it’s likely you’re going to see it from … the allies of this administration,” Sen. John Cornyn John CornynAirline job cuts loom in battleground states Senate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll MORE (R-Texas) told a local radio station. “We’ve drawn a line in the sand and said it’s not going to happen, and we just need to hold that position.”

Johnson said that he wasn’t worried about political backlash, saying, “I think my position is very reasonable: Let the people decide.”

Republicans have also tried to turn the tables on their Democratic opponents, suggesting they’re wanting to leapfrog the American people by approving a justice in the final year of Obama’s presidency.

Johnson’s campaign pointed to the filibuster of Justice Samuel Alito in 2006 by then-Sen. Russ Feingold (Wis.), the incumbent’s likely Democratic opponent. They also hit back at robocalls from a progressive outside group featuring Martin Sheen

“Senator Feingold’s left-wing campaign is made for an Aaron Sorkin TV political fantasy, so it only makes sense that a phony president from Hollywood would get a co-starring role,” said Brian Reisinger, a spokesman for Johnson’s reelection campaign.

Ayotte and New Hampshire Gov. Maggie Hassan, her likely Democratic opponent, have also traded fire, with Ayotte spokeswoman Chloe Rockow saying the Democratic governor and her “Washington allies” are trying to “exploit this issue for political gain.”

While the confirmation fight has stirred Democratic activists, vulnerable Republicans are quickly getting backup.

The conservative Judicial Crisis Network is running TV ads in the home states of Ayotte, Grassley, Johnson, McCain, McConnell, Portman and Toomey supporting them for letting “the people decide” the next Supreme Court justice.

Grassley, meanwhile, doubled down on the belief that his reelection bid is separate from the Supreme Court issue.

“I think that I have a responsibility to perform, and I can’t worry about the election. I’ve got to do my job as a senator,” he said when asked about the potential political risk during a call with reporters. “There’s going to be a lot of tough votes, so that isn’t a consideration.”