For months, Donald Trump and Sen. Ted Cruz (R-Tex.) played nice while competing for the GOP presidential nomination. Then things turned nasty. Now they've completely devolved, and the two are in open warfare. Here's a timeline of their relationship over the course of the presidential campaign.
March 23: Cruz is the first candidate to announce he’s running for president with a rally at Liberty University in Lynchburg, Va. Trump says that Cruz’s Canadian birthplace could be a “hurdle” to his candidacy.