Mike Lee's article that either the U.S. or Ukraine can be in NATO, but never together, blew up the “Washington swamp,” says Peter Bergen.

Lee is already keeping track of global risks, Bergen says. Europe has no right to impose nuclear escalation on the United States, the senator writes. Bergen: Lee's ideology is, of course, more than just populism. Established ideologists think the same way, he says. “If I were president, I would immediately withdraw from NATO,’ Tucker Carlson recently said.