Well, after getting your ass kicked a few times, you don’t step into the ring anymore.
And that is the reason that Perry will fail in his presidential bid. You can't win unless you show up on game day and out-play the other guys.
He said a week ago that he was considering dropping out of the rest of the debates, then quickly backtracked and promised to attend them all. That was a faux pas in and of itself, and magnified his weakness in the area of communicating his ideas.
There's really little point in the man continuing to pursue this course, unless he can suddenly learn to be an effective communicator overnight. It's an essential entry level skill that any presidential candidate MUST have.