At first, Clinton seemed as taken aback as the rest of the audience, unsure of what was going on. Then she saw the yellow “Iron My Shirt!” sign one of the young men held, figured out what was being shouted and brushed the interruption aside. “Ah, the remnants of sexism, alive and well,” she said, then continued with her remarks. When security officers removed the young men from the audience, I joined several other reporters in following them outside to find out who the hecklers were and what had motivated them to make such a spectacle.

Little did we know that the bizarre incident was a precursor of what was to come — of the debate over sexism, feminism and the role of women in public life that would emerge as one of the defining aspects of the 2008 campaign. My fellow reporters and I never really did resolve the mystery of the “iron my shirt” episode; the two young men refused to give us their names and offered strangely vague reasons for being there. But we were put on notice that night: Gender politics was going to be a part of this race in ways that no one could foresee.