At least eight House Republicans who are Democratic targets in 2018 are calling on Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE to recuse himself from any investigations into Russian involvement in Donald Trump’s presidential campaign as pressure mounts from both parties for him to step aside.

GOP Reps. Brian Mast (Fla.), Mike Coffman (Colo.), Martha McSally (Ariz.), Darrell Issa (Calif.), Ryan Costello (Pa.), Barbara Comstock (Va.) and Carlos Curbelo (Fla.) have all been named as targets by the Democratic Congressional Campaign Committee (DCCC). With the exception of freshman Mast, all are in districts won by Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonBiden courts veterans amid fallout from Trump military controversies Biden looks to shore up Latino support in Florida MLB owner: It's 'very necessary' to vote for Trump MORE in November.

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Rep. Frank LoBiondo (R-N.J.), a House Intelligence Committee member who is also on the DCCC list, also joined the calls.

All eight have said Sessions should recuse himself from any probes the Department of Justice (DOJ) conducts related to Russia, after reports emerged that he did not disclose to Congress contact he had with the country’s ambassador during the 2016 campaign.

Democrats are hoping they can link Republicans in swing districts to the president and harness the energy from anti-Trump backlash as they seek to regain the House majority next year.

House Majority Leader Kevin McCarthy (R-Calif.) and House Oversight Committee Chairman Jason Chaffetz Jason ChaffetzThe myth of the conservative bestseller Elijah Cummings, Democratic chairman and powerful Trump critic, dies at 68 House Oversight panel demands DeVos turn over personal email records MORE (R-Utah) have also called for Sessions to recuse himself and to clarify his statements before the Senate Judiciary Committee.

GOP Sens. 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) and Susan Collins Susan Margaret CollinsGOP short of votes on Trump's controversial Fed pick Congress must save the Postal Service from collapse — our economy depends on it Garcetti: I would have acted sooner if Trump hadn't downplayed virus MORE (Maine) did the same.

At issue is whether Sessions deliberately misled Congress during his confirmation hearings about contact with Russian officials.

Sen. Al Franken Alan (Al) Stuart FrankenPeterson faces fight of his career in deep-red Minnesota district Getting tight — the psychology of cancel culture Tina Smith wins Democratic Senate primary in Minnesota MORE (D-Minn.) asked Sessions during his confirmation hearing to be attorney general what he would do if he learned of evidence that Trump campaign associates were in contact with the Russian government.

“I’m not aware of any of those activities. I have been called a surrogate at a time or two in that campaign and I did not have communications with the Russians,” Sessions replied.

Sen. Patrick Leahy Patrick Joseph LeahyBattle over timing complicates Democratic shutdown strategy Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election Top Democrats press Trump to sanction Russian individuals over 2020 election interference efforts MORE (D-Vt.) also asked Sessions — via a written questionnaire — if he had been in contact with anyone connected to any part of the Russian government about the 2016 election before or after Election Day.

Sessions had a one-word answer: “No.”

However, The Washington Post first reported Wednesday night that he spoke with the Russian ambassador to the U.S. during the presidential race.

Sessions said earlier Thursday he would recuse himself if it’s “appropriate.”

Sessions “needs to clarify any misconceptions from his confirmation hearing on the matter,” Comstock, who represents a swing district in Northern Virginia that Clinton won by 9.9 points, said in a statement. “Attorneys General have recused themselves in the past like former Obama Administration Attorney General Eric Holder Eric Himpton HolderThe Hill's Campaign Report: Trump's rally risk | Biden ramps up legal team | Biden hits Trump over climate policy Biden campaign forming 'special litigation' team ahead of possible voting battle Pompeo, Engel poised for battle in contempt proceedings MORE in 2013.”

In May of that year, the Obama attorney general removed himself from involvement in a DOJ leak probe that secretly seized phone records of Associated Press journalists.

Curbelo, who represents a competitive South Florida district that Clinton won by 16.2 points, said Sessions’s alleged meetings with the Russian ambassador should also be a part of an investigation.

“Regardless of whether the Attorney General misspoke or misled at his Senate confirmation hearing, the Justice Department should include these alleged meetings in their investigation and Mr. Sessions should recuse himself from Justice Department activities related to the investigation,” Curbelo said in a statement.

Nevada’s Dean Heller Dean Arthur HellerOn The Trail: Democrats plan to hammer Trump on Social Security, Medicare Lobbying World Democrats spend big to put Senate in play MORE — the most vulnerable GOP senator up for reelection in 2018 — became the third Senate Republican to call for Sessions's recusal on Thursday afternoon. He also said the attorney general should "explain his interactions" with Russia's envoy.

Heller is the only GOP senator up for reelection this cycle who represents a state won by Clinton. Democrats must defend 10 incumbents in states carried by Trump, and Heller will be the party's best Senate pickup opportunity.

About an hour before Heller's statement, the Nevada Democratic Party mounted pressure on him to break his silence and call on Sessions to resign.

Democrats are demanding Sessions step down from the Justice Department entirely.

House Minority Leader Nancy Pelosi (D-Calif.) said, “we are far past recusal” and Senate Minority Leader Charles Schumer Chuck SchumerOvernight Health Care: Schumer calls for Azar to resign over 'chaos' in coronavirus response CNBC's Cramer calls Pelosi 'crazy Nancy' in live interview Schumer calls for Azar to resign over 'chaos' in coronavirus response MORE (D-N.Y.) echoed a similar sentiment.

The House Democrats’ campaign arm argues that anything less than a call for resignation falls short.

“When it comes to lying under oath to Congress, recusal is not enough,” DCCC spokeswoman Meredith Kelly said. “Attorney General Sessions lied to Congress and the American people, and House Republicans should represent their constituents and call for his resignation. Full stop.”

No Republican has gone that far at this point.

Mast, who represents a district won by President Trump Donald John TrumpTrump says he doesn't think he could've done more to stop virus spread Conservative activist Lauren Witzke wins GOP Senate primary in Delaware Trump defends claim coronavirus will disappear, citing 'herd mentality' MORE but was considered competitive in 2016, was the first Republican to raise the specter of Sessions resigning.

"Jeff Sessions needs to immediately clarify his Senate testimony and recuse himself from any investigation into Russian ties. If he cannot commit to ensuring this process is completed with full transparency and integrity, he should resign," Mast said in a statement.

Not all the Republicans facing competitive reelection bids next year have weighed in yet.

Requests for comment to lawmakers such as Reps. Will Hurd (Texas) and Steve Knight (Calif.) weren’t immediately returned.

Updated at 4:05 p.m.