Romney may not be as immature as Trump however his political agenda was not unlike Trump's.
Neither am I convinced that he is intelligent.

His neo-liberal  legislative agenda was similar to Trump's both on the economic and on the social side.  His comments regarding Americans who do not pay tax were particularly odious.

For a man who is a leader in the Mormon Church he shows a remarkable disregard for the less fortunate together with an unwillingness to separate church and state.