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Sen. Ted Cruz (R-Texas) said it's "disappointing and disturbing" that former National Security Adviser Michael Flynn pleaded guilty to making false statements to the FBI.

As part of the plea deal, Flynn has agreed to cooperate with the Special Counsel Robert Mueller's investigation, which is looking into Russian interference in the 2016 U.S. presidential election.

"Gen. Flynn has many decades of honorable service defending this nation. And it is sad to see that he is now pleading guilty to criminal conduct," Cruz said on "The Daily Briefing." "That gives all of us reason to pause."

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He noted that there are multiple investigations into Russian meddling in the election and they all have a long way to go.

"I think we should wait until we see all the facts and all the evidence before coming to a final judgment," Cruz said.

Flynn, a retired Army lieutenant general, is the first Trump ex-White House official charged in Mueller's probe.

Watch more from Cruz above, including his reaction to the not guilty verdict in the Kate Steinle murder trial.

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