From CNN Political Editor Mark Preston

WASHINGTON (CNN) -- Sen. Hillary Rodham Clinton, D-New York, heads to Northern Virginia this afternoon to help raise money for former Navy Secretary Jim Webb, a Democrat challenging Republican Sen. George Allen.

Clinton is to appear at a "Women for Webb" lunch in Alexandria that is expected to draw about 100 people, according to the Webb campaign. A campaign spokeswoman said they do not have an estimate of how much will be raised, but noted the lunch will be "a full house with all goals met."

Dick Wadhams, Allen's campaign manager, challenged Clinton to ask Webb about an article he wrote in 1979 in which he argued that women should not be allowed to attend the United States Naval Academy. In the same article published in Washingtonian Magazine, Webb also described the dormitory as a "horny woman's dream."

"I think it is an opportunity for her to ask James Webb why he made those disrespectful, disparaging remarks about women at the Naval Academy," Wadhams said. "Why he referred to a Naval Academy dorm as a ‘horny woman's dream.’ This is a great opportunity for our opponent to respond to questions like that."