I think Carville is sincere here.

Via Mediaite:

“I think he is the most talented and fearless Republican politician I’ve seen in the last 30 years,” Carville asserted emphatically, as the panel discussed Cruz’s reported presidential aspirations. “I further think that he is going to run for president, and he is going to create something.”

That’s not to say Cruz would win, Carville noted, but “this guy has no fear. He just keeps plowing ahead. He is going to be something to watch.”

“I don’t agree with,” he added elsewhere in the segment, but: “This guy is something.” And “more talented than all of the other guys.”