On Tuesday British Prime Minister Theresa May gets a second chance to have her controversial European Union deal voted through Parliament — or not. Originally set for December, this ballot was delayed after the government realized it would lose the vote by a landslide. She then faced and survived a no-confidence vote.

Out of the members of Parliament who backed her last time, some genuinely supported May and her deal. Others have government jobs that depend on her. Still others felt that getting rid of her might increase calls for a general election that they were afraid of losing, no matter who replaced her. Rebels who thought it was still worth that risk were eventually won over by her eleventh-hour announcement that she would resign before the next election.