Prime Minister Boris Johnson fought attempts Saturday to potentially further delay Britain’s protracted departure from the European Union, as MPs debated his divorce deal less than two weeks before the Brexit deadline. Parliament was holding its first Saturday sitting since the 1982 Falklands War to discuss the terms of a last-ditch divorce agreement Johnson struck with European Union leaders Thursday. The prime minister needs a clear vote in favour of his deal on Saturday to avoid triggering a law requiring him to ask the EU to delay Brexit for the third time.