Maybe I am giving away my age with the reference to the 60's TV game show, but this is an ad that just needs to be made.
"I am Mitt Romney" (audio taken from from one of Romney's I approve this message blessings)
insert - Romney pontificating on some/any issue and stating a position
"I am Mitt Romney"
insert Romney taking a different position on same issue.
"I am Mitt Romney"
insert Romney contorting into yet another position on same issue.
Close - "Will the real Mitt Romney please stand up?"