House Republicans are launching a new attack on the president’s health care law, just days after the law beat expectations by signing up more than 7 million Americans.

The House GOP scheduled a vote Thursday to change the law’s definition of full-time work from 30 hours a week to 40 hours a week. The result would be that fewer workers would get employer-sponsored health coverage.

Republicans say the change would give relief to businesses that have to cover full-time workers or pay a fine. They seized on a recent report saying the law will lead workers to cut their hours or leave the workforce.

Democrats say “Obamacare” is starting to work.

The vote offers an early test of whether the law’s sign-up success will strengthen Democratic unity.

(AP)