Former House Speaker Newt Gingrich on Friday dismissed ex-FBI Director James Comey as "almost a pathological liar" and a person who has practiced how to act sincere.

"You're looking at a guy who around the seventh grade practiced sincerity," Gingrich said on Fox News' "Fox and Friends" after watching a clip of Comey speaking with CNN on Thursday.

"'I didn't really mean to hit the car,'" Gingrich said, mimicking Comey's expressions. "' I don't know how the baseball got out of my hands. I think my cousin must have done it. Because I couldn't have done it.'"

The "pained, 'I hate throwing [Andrew] McCabe under the bus'" look Comey had shows he's acting, and that makes him "almost a pathological liar," said Gingrich.

"I'm saying he taught himself a early age a series of self-serving emotions," said Gingrich. "Watch him for a couple of hours of this stuff. He uses it over and over and over."

Further, he said he's noticed that Comey often says he's "disappointed" with "almost every authority figure," from President Donald Trump down.

Gingrich also predicted that Comey and his former deputy McCabe will turn up in criminal court "as witnesses against each other," and he thinks both of them broke the law.

"Think about it," Gingrich said. "This is our most important law enforcement agency."

The former speaker also urged watchers to Google Deputy Attorney General Rod Rosenstein's memo about Comey, and called it "one of Trump's original mistakes" not to release the memo before firing Comey.

"Trump should have done nothing for three days," said Gingrich. "He should have gotten the report and released it and let the Sunday talk shows deal with the report. Rosenstein's report that we'll never be able to fix the FBI as long as Comey is here."

Gingrich also complained about Democrats who are refusing to confirm CIA Director Mike Pompeo as secretary of state.

"I think the president should start going into every state with a Democratic senator and lead a patriotic pro-American rally, that says what the Democrats are doing in the Senate is destructive of the United States," said Gingrich. "You look at the total number of people they have bottled up, ambassadors, various appointments, the degree the president is running the government with one-third of people he ought to have."