Donald Trump vs. Hillary Clinton, Donald Trump vs. the media, Donald Trump vs. Republican Party grandees—we’ve seen it all before. But this week marks the emergence of a new split: Donald Trump vs. his own closest supporters.

For about a week now, Trump has been insisting that the election is being rigged.

“The whole thing is one big fix. It’s one big fix. It’s one big ugly lie. It’s one big fix,” he said last week. “The process is rigged. This whole election is being rigged. These lies spread by the media, without witnesses, without backup or anything else, are poisoning the minds of the electorate.”

For nearly as long, Republicans have been criticizing him for saying so. Some of those are the usual suspects, like Senator Jeff Flake, one of the GOP’s most outspoken Trump critics. Ohio Governor John Kasich likened Trump’s comments to moon-landing truthers—though it turns out Trump confidant Roger Stone is apparently one of those, too. But the chorus of critics has also included some members of Trump’s inner circle.