WASHINGTON (AP) - The new Republican-led House is poised to vote to repeal President Barack Obama's landmark health care law.

Republican lawmakers are expected to deliver an emphatic thumbs-down on Wednesday, though they have no ready substitute of their own for fixing the nation's health care system.

The House vote could turn out to be the high-water mark for repeal, a goal that energized conservative voters in the midterm elections and helped Republicans return to power in Congress. Democrats, who hung on to the Senate, have vowed to block the GOP drive.

But House Republicans warn not to underestimate their determination or their willingness to use parliamentary maneuvers to deny the Obama administration funds needed to carry out the law.

The law aims to provide coverage to more than 30 million uninsured people.