The United Kingdom was still reeling Sunday from its cataclysmic vote to leave the European Union, with a shakeup of the entire political order underway in Westminster as the economic prospects for the country remain cloudy. Following David Cameron’s announcement of his resignation Friday—one day after Britons voted 52-to-48 percent in favor of leaving the 28-nation bloc—the Conservative Party must now nominate a new party leader and prime minister. Boris Johnson, the former Mayor of London and champion of ‘Brexit,’ is currently in pole position.