According to CNN, this happened:
Yesterday, when Ileana Ros-Lehtinen, a Republican congresswoman from Florida, received a telephone call from Barack Obama, she hung up, thinking it was a prank call. When he called back, she hung up again. Then, when Rahm Emanuel, with whom she had served in Congress, called to tell her that it was, in fact, the real Barack Obama, she hung up on him too. Eventually, Foreign Affairs Committee Chairman Howard Berman convinced her that it was actually Obama, but only after he told her a story that only the two of them would know.
I stand by my comment that Sarah Palin is the gift that keeps on giving.