Conservative radio host Rush Limbaugh made a rare television appearance Sunday morning, joining "Fox News Sunday" host Chris Wallace to discuss ISIS and the Syrian refugee crisis.

After criticizing President Obama for seeming more angry at Republicans than the terrorists who attacked Paris, Limbaugh moved on to comment about the Republican presidential nominees, offering a glowing review of Donald Trump.

"Donald Trump is, I think, doing a great service," Limbaugh said. "He is showing that you do not have to fear attacks from media. He's showing you do not have to fear being politically correct or violating political correctness."

Limbaugh also praised Ted Cruz as "brilliant" and called Ben Carson "one of the most decent human beings in this country." But when questioned if Carson was equipped to be president, Limbaugh had a surprising answer.

"Ben Carson equipped to be president? Probably not at this stage," Limbaugh said, later noting that he'd still vote for him over Hillary Clinton for president.

Limbaugh wasn't so high on Jeb Bush, saying he thinks the former Florida governor doesn't seem to really want to run for president.

"I'm watching, and I just -- I don't see passion. I don't see fire," Limbaugh said. "It's as though people in his camp want him to do it because they want to get back in power."