Bill Bennett appeared on "Fox & Friends" Friday to weigh in on President Trump's war of words with Supreme Court Chief Justice John Roberts, saying this is a fight Roberts should not have picked.

It started last week when Roberts offered a rebuke to Trump's description of a judge who ruled against Trump's new migrant asylum policy as an "Obama judge."

“We do not have Obama judges or Trump judges, Bush judges or Clinton judges,” Roberts said in a statement provided to Fox News. “What we have is an extraordinary group of dedicated judges doing their level best to do equal right to those appearing before them."

Roberts added: “That independent judiciary is something we should all be thankful for.”

Trump fired back in a series of tweets, continuing his criticism of "Obama judges," and calling the Ninth Circuit Court of Appeals a “total disaster” with a “horrible reputation.”

Sorry Chief Justice John Roberts, but you do indeed have “Obama judges,” and they have a much different point of view than the people who are charged with the safety of our country. It would be great if the 9th Circuit was indeed an “independent judiciary,” but if it is why...... — Donald J. Trump (@realDonaldTrump) November 21, 2018

.....are so many opposing view (on Border and Safety) cases filed there, and why are a vast number of those cases overturned. Please study the numbers, they are shocking. We need protection and security - these rulings are making our country unsafe! Very dangerous and unwise! — Donald J. Trump (@realDonaldTrump) November 21, 2018

Justice Roberts can say what he wants, but the 9th Circuit is a complete & total disaster. It is out of control, has a horrible reputation, is overturned more than any Circuit in the Country, 79%, & is used to get an almost guaranteed result. Judges must not Legislate Security... — Donald J. Trump (@realDonaldTrump) November 22, 2018

....and Safety at the Border, or anywhere else. They know nothing about it and are making our Country unsafe. Our great Law Enforcement professionals MUST BE ALLOWED TO DO THEIR JOB! If not there will be only bedlam, chaos, injury and death. We want the Constitution as written! — Donald J. Trump (@realDonaldTrump) November 22, 2018

Hume on Stacey Abrams' Claims: Dems' Hypocrisy on GA, FL Election Results Is 'Remarkable'

Tammy Bruce: Women's March Became All About Identity Politics, Not Women's Rights

Bennett said Trump is "certainly right" that many federal judges engage in judicial activism, particularly those on the Ninth Circuit.

"If you have eyes, you can see that. If you read their opinions, you can see that," Bennett said.

He noted that this is not the first time a president clashed with a chief justice, pointing to Abraham Lincoln's "fierce debate" with Roger B. Taney over Dred Scott and habeas corpus.

"So this is a fight that John Roberts, I think, didn't want to pick," Bennett said. "By the way, when he talks about the independence of the judiciary, I wonder if he tapped Ruth Bader Ginsburg on the wrist when she was criticizing candidate Trump and saying he was a fake and a phony, because that's not really above the fray, is it?"

Watch the "Fox & Friends" segment above.

Duffy on Roberts Criticizing Trump: Why Didn't He 'Chastise Obama' After 2010 SOTU Remarks?

Obama: Racism, Hate, 'Mommy Issues' Hindering the Nation's Progress

Sen. Graham: US Cannot 'Look Away' From Saudi Arabia's Killing of Khashoggi

Christian Cal-Berkeley Student Senator Told to Resign for Not Backing Pro-LGBTQ Resolutions