"There's some in our party that want to assume that government is the answer to all of our problems," Bush said at a meeting of young Republicans, as reported by the Orlando News. "You know who I'm talking about," he added, referencing Crist.
After the speech, Bush said Crist is perhaps becoming more of a "D light" politician, not adequately in line with Republican politics.
Bush, 32, has been mentioned as the next candidate from the Bush dynasty to seek elective office, though he said he has no plans to seek office anytime soon.
"I haven't achieved my personal goals," he said. "Definitely down the road I'd love to reassess but as of right now it's not for me.