The Speaker of the House of Commons, John Bercow, blocked another vote on Prime Minister Theresa May's Brexit plan in a surprise statement on Monday, stating that the Commons could not vote again on "the same proposition or substantially the same proposition" that was rejected by 149 votes last week.Why it matters: It throws May's plan to once again submit her Brexit plan to members of Parliament into chaos as the U.K.'s exit from the European Union looms in 11 days.Go deeper: Everything you need to know about Brexit