A GOP group tied to George Conway George Thomas ConwayGeorge Conway hits Trump on 9/11 anniversary: 'The greatest threat to the safety and security of Americans' Susan Collins faces battle of lifetime in Maine Conway hails Trump as 'champion' of women MORE, the husband of White House counselor Kellyanne Conway Kellyanne Elizabeth ConwayGeorge Conway hits Trump on 9/11 anniversary: 'The greatest threat to the safety and security of Americans' Juan Williams: Swamp creature at the White House Oversight Democrats press for probe into possible Hatch Act violations MORE, released a new ad Monday that paints Sen. Cory Gardner Cory Scott GardnerAirline job cuts loom in battleground states House approves bill to secure internet-connected federal devices against cyber threats Congress needs to finalize space weather bill as solar storms pose heightened threat MORE (R-Colo.) as a puppet of 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.

The ad, posted on Twitter by The Lincoln Project, implores Gardner to work for the interests of voters in his state, warning that otherwise he will lose his reelection bid to his presumed Democratic challenger, former Gov. John Hickenlooper John HickenlooperGOP campaign director: 'There's no doubt that Republicans will control the Senate' Susan Collins challenger open to nixing Senate filibuster Democrats struggle to harness enthusiasm of Gen Z voters MORE.

"Hey Cory Gardner, ask yourself: Why are you losing?" a narrator's voice says in the ad. "Why do polls show you heading for humiliating defeat in November? Because Colorado trusted you to work for us, not Donald Trump."

ADVERTISEMENT

"You're just another Trump servant: weak, frightened, impotent," the narrator continues.

Gardner's campaign did not immediately return a request for comment from The Hill.

Cory Gardner, do your job. pic.twitter.com/98QpeewTD8 — The Lincoln Project (@ProjectLincoln) January 13, 2020

George Conway, a vocal Trump critic, launched the Lincoln Project in December alongside other conservative opponents of the president. The group says its overall goal is to prevent Trump's reelection.

“This effort transcends partisanship and is dedicated to nothing less than preservation of the principles that so many have fought for, on battlefields far from home and within their own communities,” the group said at the time in an op-ed.

The group released its first ad earlier this month targeting evangelical support for Trump, with a video containing the message: "IF THIS IS THE BEST AMERICAN CHRISTIANS CAN DO, THEN GOD help us all."