Actually, Mitt Romney has done exceedingly well for everyone he's ever had to come through for. Here is how I would respond, assuming Romney feels the need to stoop to the asshole's level:
"It's true that I ran a major private equity firm, and I did well for all of my shareholders, as well as anyone who worked at any of the companies in which we invested. I also did well for the citizens of
a state, despite the lack of a profit motive, and I managed an entire Olympics to profitability and American success despite no specific mandate for either outcome. I've had the privilege and responsibility
of leading a number of different kinds of organizations, of vastly differing sizes, and I have been successful at each. I'm confident that I can execute the office of the President of the United States with
similar success, despite the historic challenges we all face. I would encourage the President to examine my record carefully before he makes more remarks about me, and I also encourage the President to
examine a plate of dicks and eat them, forthwith."