Newt Gingrich weighed in on the Ted Cruz-Donald Trump feud Monday night, pointing out Trump's schizophrenic-like tendencies and the lack of concern about his behavior by supporters.

"Cruz is the only current competitor that Trump is facing, that is bothering him. And Trump is a lot like the grizzly bear in [The] Revenant, you know, when you get his attention, he devours you and so he is currently, you know, in between being nice at Liberty, he is beating up Cruz," Gingrich told Fox News' Great Van Susteren, referring to a scene where a bear overpowers and molests a man.

The former House speaker said Trump's campaign team is not comfortable pushing a message that focuses on the good he has done, like when he paid for Central Park's ice skating rink or sent unsolicited money to Marine Sgt. Andrew Tahmooressi, who was imprisoned unfairly in Mexico for seven months.

Gingrich said the two contrasting behaviors indicate the outspoken Republican candidate is "a very complicated guy," but it is not something that is upsetting supporters of the second-ranked candidate, according to numbers from the Washington Examiner's presidential power rankings.

Trump's surge has been bad news for eighth-ranked Dr. Ben Carson who had initially appealed to Evangelicals. The self-funded billionaire's appearance at Liberty University's convocation Monday doubled down on his appeal to Millennial Christians.

Liberty University President Jerry Falwell, Jr. introduced the business mogul in such an "unbelievable" way that Gingrich said it could have been "an informercial on every Christian radio in the country."

"I suspect this speech, Liberty and Reverend Falwell's introductions will have a substantial impact ... across all of Iowa just because I have never seen anybody get quite — this is like Ronald Reagan, that level of endorsement," Gingrich said.