Famed First Amendment lawyer says CNN should sue the White House over Acosta access

"This is going to happen again," he said. "It's likely to happen again. So whether it's CNN suing or the next company suing, someone is going to have to bring a lawsuit. And whoever does is going to win unless there's some sort of reason."

Former ABC White House reporter Sam Donaldson, who said he's been asked to prepare an affidavit to support CNN's case, said Trump's decision to revoke Acosta's credentials "is not only wrong and unfair, it's dangerous for the press as a whole."

CNN said in a statement, "No decisions have been made. We have reached out to the White House and gotten no response."

CNN previously said the move to bar Acosta "was done in retaliation for his challenging questions."

The White House originally claimed that Acosta placed his hands on an intern who tried to take a microphone from him. Press secretary Sarah Sanders called it "inappropriate behavior." The video showed otherwise. CNN called Sanders' explanation a lie.

"She provided fraudulent accusations and cited an incident that never happened," the network said.

Abrams, the attorney, on Sunday said if the White House claims that Acosta "choked or touched this women — that's a very good reason" to revoke his pass. But, "it seems to be untrue," Abrams said.