"America doesn't need more slick promises," Perry said. "We need a principled leader who will stand on his conservative values."

Perry struggled in the GOP presidential debate Thursday night, bungling a planned attack that sought to paint Romney as a flip-flopper on social issues and misrepresenting the timing of a meeting with a Texas woman who suffered from cervical cancer. 

The Texas governor was speaking Saturday at a breakfast for delegates to the Presidency 5 Forum in Orlando, which will host a straw poll Saturday afternoon. Perry has been the only major candidate to aggressively target a win in the poll.

This is the second consecutive day that Perry has employed the "slick" attack, having also used the phrase while speaking before conservative activists Friday.

"As conservatives, we know that values and visions matter," Perry said at the Florida Conservative Political Action Conference. "It's not who is the slickest candidate or who is the smoothest debater that we need to elect. We need to elect the candidate with the best record and the best vision for our country."