A conservative group said Tuesday it will recruit and fund conservatives to challenge sitting Republican senators who oppose a bill repealing Obamacare.

"Republicans have promised to repeal Obamacare for years and now with President Trump in the White House, there is no excuse for them to break their promise," Ken Cuccinelli, president of the Senate Conservatives Fund, said in a statement. "Working with the grassroots across the country, we will seek to identify, recruit, and fund conservative challengers against Republican senators who vote against repeal."

"If they won't keep their word and if they can't find the courage to repeal a liberal takeover of our healthcare system that has hurt so many American families, they should be replaced by someone who will," Cuccinelli continued.

Senate Majority Leader Mitch McConnell announced Monday night he would revive a 2015 bill repealing Obamacare after it became clear he didn't have the votes for a Senate plan repealing and replacing the healthcare law in one bill.

The 2015 legislation, which passed both chambers of Congress but was vetoed by former President Barack Obama, repealed Obamacare's major provisions and gave Republicans two years to draft a replacement plan.

McConnell, R-Ky., said he would bring the 2015 bill before the Senate for a vote after two Republican senators, Mike Lee of Utah and Jerry Moran of Kansas, said they would oppose a procedural vote to start debate on the Senate healthcare plan.

With their defections, the bill, called the Better Care Reconciliation Act, was effectively dead.

Conservatives cheered McConnell's decision to pursue a two-step, repeal-and-delay strategy, but some Republicans rejected the plan.

Three Republicans — Sens. Shelley Moore Capito of West Virginia, Susan Collins of Maine, and Lisa Murkowski of Alaska — said they would block a motion to proceed to debate on the 2015 bill, dooming McConnell's revised strategy.

If the Senate Conservatives Fund follows through on their promise to draft conservative primary opponents, it appears the three senators could face conservative challengers recruited by the group the next time they're up for reelection.

Capito and Murkowski voted for the bill repealing Obamacare in December 2015, but Collins opposed it.