Boris Johnson, the Brexiteer who has promised to lead Britain out of the European Union with or without a deal by the end of October, will replace Theresa May as prime minister after winning the leadership of the Conservative Party on Tuesday.
His convincing victory catapults the United Kingdom towards a showdown with the EU and towards a constitutional crisis at home, as British lawmakers have vowed to bring down any government that tries to leave the bloc without a divorce deal.
Johnson, the face of the 2016 Brexit referendum, won the votes of 92,000 members of the Conservative Party, almost twice as many as his rival, Foreign Secretary Jeremy Hunt.
May will leave office on Wednesday after going to Buckingham Palace to see Queen Elizabeth, who will formally appoint Johnson.
