Lindsey Graham can do better than this.

The South Carolina Republican U.S. senator says that Donald Trump “probably shouldn’t” use the term “Spygate” to level an accusation that the FBI planted someone inside his presidential campaign for political purposes.

Actually, Trump is defaming the FBI yet again by making an assertion without the hint of evidence that what he is saying is true.

Trump most clearly shouldn’t use such language to describe what the FBI might have done, which is to probe questions that arose during the 2016 campaign that Russians were meddling in our election and trying to turn the tables in Trump’s favor.

Rather than welcome an FBI investigation into that allegation, Trump has decided to declare political war against the law enforcement agency and leaders at the top of the Department of Justice.

He is seeking to discredit the special counsel’s probe. He has launched a scorched-Earth campaign against the FBI. He has introduced the term “spy” to describe the FBI’s effort to get to the bottom of the Russia meddling caper.

Graham offered radio host Hugh Hewitt a milquetoast response to the question about the Trump’s reckless language: “I don’t know. Probably not, but I don’t know,” he said. “I didn’t go to the meeting. I don’t think it’s — I don’t think he’s a spy. And I don’t know who this person was.”

Trump’s continuing campaign against the FBI is a disgrace.