Newt Gingrich. John Moore/Getty Images Newt Gingrich sounded off Wednesday on Mitt Romney's latest meeting with President-elect Donald Trump about the secretary-of-state post.

Gingrich appeared on conservative radio host Laura Ingraham's show Wednesday and said Romney was "sucking up" to Trump to get the job.

"You have never, ever in your career seen a wealthy adult who is independent, has been a presidential candidate, suck up at the rate that Mitt Romney is sucking up," Gingrich said.

The former House speaker is a vocal supporter of Trump and was at one point a contender to be Trump's running mate. But he has been one of a few members of Trump's inner circle who have pushed back on the idea of Romney as secretary of state.

Gingrich continued:

"I am confident that he thinks now that he and Donald Trump are the best of friends, they have so many things in common. That they're both such wise, brilliant people. And I'm sure last night at an elegant three-star restaurant, he was happy to share his version of populism, which involve a little foie gras, a certain amount of superb cooking, but put that in a populist happy manner."

Romney, the former Massachusetts governor and 2012 GOP presidential nominee, is apparently still among the top four people under consideration for the secretary of state role. His candidacy has rubbed a few early Trump loyalists the wrong way.

On Tuesday, Bloomberg reported that the search was down to five candidates: Romney; Bob Corker, the Senate Foreign Relations Committee chair; David Petraeus, the former CIA director; Rudy Giuliani, the former New York City mayor; and John Kelly, a retired Marine Corps general. Trump was meeting with Kelly on Wednesday.

Listen to Gingrich's interview below: