Remember, this is the man who can't be bothered to show up to vote in the senate. I have a feeling his presidency would be an Eisenhower redux, with Nixon and other Suits actually running things while the president plays golf. So who do you think Rubio would pick as his running mate? What is that person's character like?
Nixon didn't run jack while Ike was President. Ike gave the illusion of doing nothing so as to appear above the fray politically, while Nixon was his attack dog against opponents and the press; This made Ike look presidential while also keeping his saber at the ready politically. He had Sherman Adams basically as a proto-Haldeman.