"His mannerisms, his expressions, his sarcasm, etc. can be off-putting at times," said Mark Souder, a former Indiana congressman.
NBC News targets Kasich: 'Too cranky to be president' →
"He's the best idea guy in either party," Mr. Souder said. "He should get in the race because I think we need someone who can push issues. ... I haven't made up my mind yet, but shoot, I might back him."
Inside Politics →