As Twitchy and many other sources noted following Saturday night’s Republican debate in South Carolina, things started out tame but got ugly when candidates started accusing each other of being liars. The dam broke when Donald Trump gestured to Sen. Ted Cruz and said, “You probably are worse than Jeb Bush. You are single biggest liar,” adding later for good measure, “He’s a nasty guy.”

Cruz quickly countered with a reference to Trump’s support of taxpayer funding of Planned Parenthood and argued, “Donald has this weird pattern, when you point to his own record he screams, ‘liar, liar, liar.'”

MSNBC’s Christopher Hayes tweets that he’s been keeping track, and claims that between Saturday’s debate and Monday’s campaign rallies, Trump has called Cruz a liar 52 times.

Jeb Bush jumped into the fray Saturday as well, bringing up Trump going bankrupt. “It’s another lie. This guy doesn’t know what he’s talking about. Just a lie,” Trump responded.

Fact check needed: