House Republicans are pushing legislation to restrict abortion rights to appease their conservative base, the chairwoman of the Congressional Pro-Choice Caucus said.

"Why they're doing this, I think it shows their true colors, which is that they're trying to cater to the far right," Rep. Diana DeGette (D-Colo.), one of the House’s leading abortion rights advocates, told MSNBC Wednesday evening.

House Republicans introduced two major anti-abortion rights bills this week, and Senate Democrats worry their GOP colleagues will use a variety of legislative maneuvers to force a vote on the Senate floor.

The bills aim to stop abortions by barring funding in the Obama administration's healthcare reform law, extending certain restrictions on abortions and slashing federal funding for Planned Parenthood.

Two Senate Democrats, Kirsten Gillibrand (N.Y.) and Richard Blumenthal (Conn.), have vowed to block any anti-abortion bills that come to the Senate.