He only signed onto TPA because McConnell straight up lied to his face. Multiple times.
Guess what Cruz did when he uncovered the truth? He immediately withdrew support and called McConnell a liar from the floor of the Senate. I don’t know about you, but I respect that tremendously. No other candidate in this race has been as hostile to the establishment as Cruz. Believe me, what we see in public is tame to what really goes on behind closed doors when the knifes come out.
No other candidate has been rolled by Mitch McConnell as often as Cruz. Too bad he didn't listen to his own staff's warnings about the turtle.