Judicial Watch President Tom Fitton said that the firing of former FBI agent Peter Strzok was "long overdue."

Strzok, who played leading roles on the Clinton email investigation and the Russia probe, was terminated from the bureau on Friday, according to his attorney, who added that the firing was politically motivated.

He testified before Congress last month about the slew of Trump-bashing texts he sent to Lisa Page, his former co-worker and lover, using his FBI phone.

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Fitton said Monday on Outnumbered Overtime that Strzok is an "architect" behind the Russian collusion theory and that there would be no probe without him.

"It's a body blow to the Mueller investigation," he said, adding that Strzok shouldn't have been near either the Clinton or Mueller investigations.

Strzok was escorted from his office in June after the release of Department of Justice Inspector General Michael Horowitz's report that laid out his biased text messages.

He has steadfastly maintained that he exhibited no bias in his capacities as a top FBI investigator.

Fitton said that Page's private testimony should be publicly released in order to get a fuller understanding of her relationship with Strzok as it pertains to the Mueller probe.

Page appeared before select House committee members for nearly five hours last month and answered questions about her texts exchanged with Strzok.

"This is just typical of what's going on at the Justice Department and FBI. They don't think they answer to Congress, they don't answer to the president and they don't answer to the rule of law," Fitton said.

Watch the interview above.

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