The first instinct is to respond in kind.
Point out Grayson’s well documented history of being disrespectful to women. Draw attention to his reference to the female lobbyist as a “K-Street whore”, or, go even further and talk about the persistent rumor that has been circulating about Alan Grayson slapping a female coworker a few years back – an action that reportedly resulted in him being committed to a mental institute for several days.
But, to do that, we allow ourselves to stoop to his level, which we won’t do.