in his case it is critical that he doesn't screw up the pick. Newt Gingrich is being floated because he is sorta an advisor to Trump (not that Trump consults with him before Trump puts his foot in his mouth). But Newt is as old as Trump and would probably do a better job as chief of staff is the electorate inflicts us with a Trump Presidency. The General ? Too many policy differences with the Republican base. He will cost Trump votes . Mike Pence is a Governor of an important state ,and was an influential Congressman in his time. I was for his selection to be on the Romney ticket and my opinion of him hasn't changes. Had he run for President I would have gladly supported him.