There is something about the Trump University lawsuit that has been driving Donald over the edge and now one of his allies is not following the company line.

Newt Gingrich, who is a contender to become Trump's VP, told Fox News Sunday host Chris Wallace that Donald's attack on the heritage of a federal judge" is one of the worst mistakes Trump has made and I think it's inexcusable."

That was a very factual statement from Gingrich to point out because Trump has been making the media rounds this week defending those criticisms. And Trump doesn't like his supporters being this outspoken against once of his tirades.

Gingrich then followed that up by saying, "if a liberal were to attack Justice Clarence Thomas on the grounds that he's black, we would all go crazy."

Full transcript:

WALLACE: Are you comfortable with a potential president attacking a federal judge for his heritage?

GINGRICH: No. This is one of the worst mistakes Trump has made and I think it's inexcusable. He has every right to criticize a judge and he has every right to say certain decisions aren't right and his attorneys can file to move the venue from the judge. But, first of all, this judge was born in Indiana. He is an American, period. When you come to America, you get to become an American. And Trump who has grandparents who came to the U.S. should understand this as much as anybody. Second, to characterize, you know -- if a liberal were to attack Justice Clarence Thomas on the grounds that he's black, we would all go crazy. Every conservative would say it was wrong and it was racism. And Trump has got to, I think, move to a new level. This is no longer the primaries. He's no longer an interesting contender. He is now the potential leader of the United States and he's got to move his game up to the level of being a potential leader.

WALLACE: Do you consider what this -- he did here racism?

GINGRICH: I think that it was a mistake. I think that -- I hope it was sloppiness. He says on other occasions that he has many Mexican friends, et cetera, but that's irrelevant. This judge is not Mexican. This judge is an American citizen and deserves to be treated -- now, that means he can attack him as a judge and say he is a liberal and he is against me and doing things I don't agree with and he has lawyers who are supposed to be doing that. If it's a good case they should file to change the venue.

Of course it is racism and Gingrich knows it, but he would never go that far.