Republicans have cleared legislation for a vote in the House that authorizes the filing of an election-year lawsuit accusing President Barack Obama of failing to implement the 4-year-old health care law.
The vote in the Rules Committee was 7-4, with all Republicans in favor and all Democrats opposed.
Republicans say the lawsuit is necessary because Obama is exceeding his authority by failing to carry out legislation that Congress passed and he signed into law.
Democrats counter that the lawsuit is a political stunt designed to improve Republican chances in the November elections.
A vote in the full House is expected next week, just before a scheduled month-long vacation begins for lawmakers.