Judicial Watch President Tom Fitton said Tuesday newly-revealed text messages between fired FBI official Peter Strzok and former FBI attorney Lisa Page are just more evidence of the anti-Trump bias that was prevalent at the FBI and Justice Department.

Two new texts show the officials discussing a "media leak strategy" amid the Trump-Russia probe.

"A 'media leak strategy' is just what it says, an 'insurance policy' is just what it says, when Strzok writes 'we'll stop' President Trump, everyone knows what that means," Fitton said on "Outnumbered Overtime."

Fitton said Judicial Watch has been litigating against the FBI for 20 years and he's consistently seen from the bureau "arrogance, illegal secrecy and contempt for the rule of law."

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"You had the leadership at the FBI who thought they could get away with illegally targeting a candidate for the president of the United States," Fitton said.

He said that type of bias was a problem when former FBI Director James Comey ran the bureau, and it was a problem before him under Robert Mueller, who is now leading the Russia probe as special counsel.

Fitton pointed out that Comey was fired, Strzok was fired, former FBI deputy director Andrew McCabe was fired, and he thinks that Mueller should be next.

"We need to hold Mr. Mueller accountable for what went on here, because these are the cops that made Mueller's case," Fitton said. "And without Strzok, without Page, without this illicit activity related to the DNC dossier, without the illegal targeting of Carter Page, in my view, you wouldn't have a Mueller investigation."

He said Mueller's investigation has been "marred" and "corrupted" and it's time for it to be shut down.

Watch more above.

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