"I'm not voting for Donald Trump. Period. … These bully, dirty tricks, Nixonian tactics, they're only going to backfire. So, count me as never Trump," Levin said Friday. 
Stone has launched a "Stop the Steal" campaign aimed at stopping the GOP from nominating anyone other than Trump during the Republican National Convention in Cleveland in July. He has threatened to make public the hotel rooms of delegates who switch from Trump. 
"There's been too much of this folks, way too much of this," Levin said. "The crap in the National Enquirer against Ted Cruz, the attacks on Michelle Fields, I mean, I can go right through the list, too much, too much, too much. At some point, you've got to stand up to it."