The same day, lawmakers held a series of nonbinding votes on eight options for Britain’s future. None mustered a majority.

Mrs. May has lost the support of much of her Conservative Party. But her overture led some past critics to say they would back her plan, which Parliament has rejected twice. It could return for a vote as soon as today, but still faces long odds.

What’s next: Mrs. May didn’t specify when she would step down, but the European Union has said that it will approve an extension in the Brexit process to May 22 if her plan gains approval. Britain has until April 12 to agree on a strategy.

White House’s new push in health care fight

President Trump decided to push to overturn the Affordable Care Act despite concerns from the attorney general, the health secretary and the vice president. In doing so, he sided with Mick Mulvaney, the acting White House chief of staff, who spent years as a South Carolina congressman calling for a repeal.