The Marriage Protection Act of 2004 (MPA) was a bill introduced in the United States Congress in 2003 to amend the federal judicial code to deny federal courts jurisdiction to hear or decide any question pertaining to the interpretation of the Defense of Marriage Act (DOMA) or the MPA itself. Introduced as H.R. 3313 during the 108th Congress, the Republican-controlled House passed it in 2004, but it did not pass the Senate.