Boris Johnson resigns as U.K.'s Foreign Secretary

Boris Johnson, the United Kingdom's Foreign Secretary, resigned from Prime Minister Theresa May's Cabinet on Monday — just hours after Brexit Secretary David Davis resigned over May's proposed plan for a "soft" Brexit, per the BBC's Laura Kuenssberg.

Why it matters: This is now a full-fledged crisis for May's premiership — Johnson has long been eyeing her position, having been an early frontrunner for prime minister just after the Brexit vote in 2016 — and it comes just before her plan to push a version of Brexit that would maintain a close economic relationship with the European Union.