(CNN) Sen. Lindsey Graham criticized the House Democrats' impeachment inquiry on Wednesday while also issuing a rebuke, and potentially a new talking point, that the Trump administration was too inept to carry out a quid pro quo in regard to Ukraine foreign policy.

"What I can tell you about the Trump policy toward Ukraine: It was incoherent, it depends on who you talk to, they seem to be incapable of forming a quid pro quo," the South Carolina Republican said outside the Senate Judiciary Committee. "So no, I find the whole process to be a sham and I'm not going to legitimize it."

He still took aim at the impeachment inquiry against President Donald Trump, saying, "I think the whole thing's a crock," and that "this whole theory of impeachment, the process is illegitimate, is outside the norm, this substance I find unpersuasive."

"Yes, it should be made public," Graham said. "The whistleblower's claims cannot be used as a basis for criminal accusations, cannot be used (as) the basis for impeachment based on anonymity."

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