Speaker-in-waiting John Boehner (R-Fla.) filed a brief Friday in federal court in favor of a lawsuit challenging the constitutionality of the new healthcare reform law.

Boehner, mirroring a move made earlier this week by Senate GOP leader Mitch McConnell (Ky.), filed an amicus curiae ("friend of the court") brief arguing that a key part of the healthcare reform bill signed into law earlier this year by President Obama should be struck down.

“I’m proud to stand with these states and the [National Federation of Independent Businesses] on behalf of America’s workers in the revolt against this job-killing health care law,” Boehner said in a statement.

“Of course, the easiest way to prevent this health care law from costing our economy more jobs is to heed the outcry for its repeal," Boehner added. "That’s why Republicans have made a pledge to America to repeal this job-killing health care law and replace it with reforms that bring down costs and protect American jobs.”

Boehner and McConnell's filings this week might be seen as supplements to their promises to try and repeal the new healthcare law, a cornerstone in their campaign platform this fall. Republican leaders acknowledge, though, that a full repeal could be difficult as long as Obama is in office.

The lawsuit, which originates in a Florida federal court, was filed by 20 state attorneys general and the NFIB. The suit argues that the so-called "individual mandate," the requirement that each individual have health insurance, is unconstitutional.