But they do not have the votes to overturn a certain presidential veto.
At the state level, 13 attorneys general are suing to kill the measure. They say the believe it's unconstitutional to force people to buy health insurance, as the new law will require.
"I do not believe the U.S. government has the right, the authority or the power to force us to purchase health insurance any more than, in the name of homeland security, they can force every American to have to buy a gun," said Republican Gov. Haley Barbour of Mississippi.
"The only way they can afford to give coverage to people with pre-existing conditions is if everyone goes into an insurance pool. It's easily within the power of the federal government, and these lawsuits are frivolous," said Penn. Gov. Ed Rendell, a Democrat.
A primary part of the argument over the lawsuit is whether the commerce clause of the Constitution allows the government to require the purchase of health insurance
Back in Chicago Sunday, Congressman Danny Davis said giving people access to primary care was one of the most important parts of the health bill.
"The expansion of Medicare and Medicaid, providing access to all of these people who've never had it in their lives, is good for America," said Davis, a Democrat who represents Chicago.
Davis spoke on a WGCI radio talk show.
The congressman says he believes that giving people care before they have to go to emergency rooms will save money.