Only three House Democrats who voted against Obamacare in 2010 are in office today as Republicans prepare to repeal the law, and they aren't likely to back the GOP plan to replace it.

Reps. Collin Peterson of Minnesota, Stephen Lynch of Massachusetts and Dan Lipinski of Illinois were among the 34 Democrats who voted against the Affordable Care Act in 2010.

All three have criticized Obamacare, which has resulted in premium spikes, high deductibles and vanishing health insurance markets, but they are not rallying behind the Republican proposal.

"I'm open to a replacement," Lipinski told the Washington Examiner. "But I don't think what the Republicans put forward is a legitimate replacement."

Lipinski said even though he has publicly criticized problems with Obamacare, he has never voted in favor of repeal measures the GOP has brought to the House floor in recent years.

"We can't throw it all out," Lipinski said. "Let's fix it so it works."

Lynch and Peterson have both called for repairing the law, although Peterson last year was the sole Democrat to vote yes on a GOP bill to repeal Obamacare and defund Planned Parenthood. Peterson told Minnesota Public Radio later that "what we should be doing is working to fix it."

The cost of health insurance has increased in Minnesota under the law to the point where Democratic Gov. Mark Dayton called it "no longer affordable." Enrollments, however, increased by 34 percent this year.

Lynch said he's not likely to vote for the GOP replacement plan because it veers in the opposite direction of creating a public option, which he supports.

"Let's see what they come up with," Lynch told the Examiner.

Lynch acknowledged the current law, "has some major flaws in it," but the law is popular in Massachusetts and experienced record sign-ups this year.

Lynch said there are "five or six" ways to fix Obamacare, including the establishment of a public option. He also backs a provision to remove the health insurance industry's anti-trust exemption, which he believes would create competition.

But Republicans have a different plan aimed at boosting competition. They want to allow insurance companies to sell policies across state lines, which they believe will lower costs and increase choices.

Both Lynch and Lipinski said they are especially wary of how the GOP plan would impact Obamacare's Medicaid expansion and subsidizing low-income earners.

They are also worried about the cost of the proposal. The Congressional Budget Office isn't expected to come up with a price tag until next week.

The GOP plan would wind down Medicaid expansion and reform Medicaid by converting it to a block grant system. It would replace subsidies with tax credits.

"They won't tell us how much it will cost and how many people would lose coverage and that is an important question," Lynch said.

Nonetheless, Lynch added, "I'll read the bill."