Donald J. Trump took an oath to protect and defend the U.S. Constitution and to protect our system of government from those who would seek to pervert it.

The Russians sought to pervert that government and our electoral process. The FBI got wind of it in real time during the 2016 presidential election and sought to use a confidential informant to get to the bottom of it.

Donald Trump’s response? He now accuses the FBI of “spying” on his campaign. He has lashed out at the FBI for doing its job, for seeking to do the very thing Trump’s oath called on him to do — which is to protect us against foreign interference.

The president has tossed that oath aside. He doesn’t give a damn about it! He doesn’t care that the Russians interfered in 2016 and are likely doing so in 2018; they well might try again in 2020.

Trump’s assertions and allegations against the FBI are virtually unprecedented in presidential history. Imagine for just a moment any president making up conspiracies. How should we react to the notion that our head of state is so dismissive of the FBI that he would put a confidential informant in jeopardy by referring to him as a “spy” empowered by the FBI to do political damage to his campaign?

The president is violating his oath. He is putting this country in the path of potentially grave peril.

Trump is proving a point I have sought to make since he announced his presidential campaign: He is categorically unfit for the office to which he was elected.