The Trump administration said on Wednesday it will make it harder for states to keep residents in the U.S. food stamp program in a move that is projected to end benefits for nearly 700,000 people.

President Donald Trump has argued that many Americans receiving food stamps through the Supplemental Nutrition Assistance Program, known as SNAP, do not need it given the strong economy and low unemployment. The program provides free food to 36 million Americans.

The administration has now finalized a rule that tightens guidelines on when and where states can waive limits on how long certain residents can receive benefits. The changes will move more "able-bodied" adults into the workplace, U.S. Agriculture Secretary Sonny Perdue said.