Title misleading. Trump never said he would go third party. He did pledge to run as GOP candidate but is rightly upset over lies by GOPe and some other candidates. Whether Cruz or Trump has the most delegates,do you expect GOPe support?
Am hoping he does run 3rd party, because he will win.
If he gets the Republican nomination, the die hard Cruz supporters will not vote for him. Too much hatred and lies from them...a lot of them will vote for Hillary over Trump; or stay home.
He will pull a lot of Republican, Democrats and Libertarians as a 3rd party candidate...it is his only way to victory, and he can do it.