With the abrupt departure of Andrea Leadsom from the Conservative Party leadership contest, Theresa May has cruised into number 10 as Britain’s new PM. To many, it appears that the Tory establishment has reasserted control over the Conservative Party. But I’m not convinced this is true–when Mitt Romney won the 2012 Republican primary, many people assumed that this meant the Republican establishment was in firm control, but within just four years Donald Trump had run Romney and the rest of the establishment Republicans off the Tarpeian Rock. Indeed, a close look at the data reveals that just as the 2012 result concealed deep weaknesses within the Republican establishment, the Tory establishment remains extremely vulnerable. May owes her victory to the incompetence and disorganization of her rivals, and she will need to be extraordinarily careful to preserve it.