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Senate Intelligence Committee Vice Chairman Mark Warner said President Donald Trump is "obsessed" with Robert Mueller's Russia probe and that he is besmirching the reputation of law enforcement.

"The president of the United States has been obsessed with this investigation since the beginning," Warner, a Virginia Democrat, told Neil Cavuto.

"I believe Special Prosecutor (sic) Mueller," Warner said. "The law is pretty clear."

Warner appeared to defend the decision to raid Trump attorney Michael Cohen's properties, saying that there was a "high bar to meet" in order to legitimize handing off the procedure to the U.S. District Court in Manhattan, N.Y.

Cavuto asked Warner how the expanding scope of the Mueller probe matched up with how the Starr probe of President Bill Clinton's Whitewater land deal scandal eventually morphed into the Lewinsky affair.

Cavuto said Democrats were critical of prosecutor Ken Starr in that regard.

Warner said he too was critical of Clinton at the time, as many of his Republican counterparts were.

"What particularly concerns me with [Trump] is his broad-based ad hominem attacks at the FBI [and] everyone at the Department of Justice," Warner added.

Warner said Trump's "frustration" with Mueller has led to uncalled-for attacks on "the basic institutions of justice" and "gives license to people who say 'maybe we shouldn't trust any of our law enforcement'."

Warner pointed out that Mueller and Deputy Attorney General Rod Rosenstein are "lifelong Republicans."

He also credited competing bills in the House and Senate, one from Reps. Charlie Dent (R-Pa.) and Peter Welch (D-Vt.) and the other from Sens. Chris Coons (D-Del.), Thom Tillis (R-N.C.), Cory Booker (D-N.J.) and Lindsey Graham (R-S.C.) that are aimed at protecting Mueller's job.

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