GOP Rep. Paul Ryan, chairman of the House Budget Committee, said Sunday that chamber Republicans will repeal the entire law.

"The stakes could not be higher," Ryan, R-Wis., said on ABC's "This Week."

GOP presidential candidate Mitt Romney has vowed that if elected he would repeal the legislation on his first day in the White House.

House Minority Leader Nancy Pelosi said Sunday that congressional Republicans have an "unrealistic" chance of passing repeal legislation and suggested they have become a "mouthpiece" for the health insurance industry.

"It's being the mouthpiece of the health insurance industry," Pelosi, D-Calif., said on NBC's "Meet the Press" about the proposed repeal effort. "And we're saying let's not have them be in charge anymore."

New York Democratic Sen. Chuck Schumer said on "Face the Nation" that Senate Democrats upon returning from their July Fourth recess will attempt to vote on tax cuts for small businesses that increase hiring, compared to the House repeal plan.