LONDON (AP) — British Prime Minister Keir Starmer is facing a career-defining decision: step down or fight a challenge from Labour Party rival Andy Burnham . Starmer has publicly vowed to stay in post, but pressure is building as more and more Labour Party colleagues conclude his time is up. Expectation is growing that he will announce a timetable for his resignation as soon as Monday. That’s the day Burnham will be sworn in as a lawmaker in the House of Commons after winning a special election