The Rules are Rigged
The Donald is having trouble playing by the rules. Republican party rules say you need 1,237 delegates to win the nomination of the first ballot. Trump says the rules are rigged by the party elite.
As of now Trump leads with 743 to 545 for Cruz. Kasich is hanging in with 143. You can get an updated count here.
Each state makes its own rules for awarding delegates and smarty pants Cruz knows the rules. After all, if you can’t figure out how to win in Colorado how will you beat Isis?