Olympic Gold Medal winner Kim Rhode was interviewed by Ginny Simone of NRA News about her speech and appearance at the Republican National Convention. Rhode gave a short speech and then introduced a number of other Olympians that were supporting Mitt Romney.
From what Kim says, her role morphed from just doing a short speech to being the one who introduced the rest of the Olympians. She admits to being nervous as well as "a huge Republican". Having watched her speech and presentation of the other Olympians, I think she did just fine.