Honestly, he would be my top pick for Trump's VP. Trump is, to some extent, breaking the Republican party - why not take another step further and take an outcast Democrat - RFK Jr. or a Tulsi Gabbard or something - as his VP? VP's aren't that important (except in emergency), but it does send an actual message of cooperation and unity that is anathema to the popular current political strategy where a politician says "We need to work together!" and then antagonizing the other side endlessly, even going so far as to paint them as enemies of the state.
Doubt it will happen but would be good for the US.