Perry said that he thought he was prepared to run the country after serving as Texas governor.
"I was mistaken," he said.
The governor said that his debate gaffe will never disappear, but that he's a lot more prepared for a 2016 run.
"I’m comfortable I’m substantially more prepared to run for the presidency," he said. "I know the challenges. And so, again, I’m not ready to pull the trigger and say I’m in, but I’m comfortable that the process I’ve put in place here is a proper, timely and thoughtful process."