You really have to watch this ad from Rep. Rob Andrews (D-NJ), the main primary challenger to Dem Senator Frank Lautenberg.

Andrews is running way behind in the polls, and now has an ad that is a very hard-hitting -- and perhaps desperate -- play for women voters. The message: Lautenberg ridiculed a female candidate's age.

The ad says that during Lautenberg's first campaign in 1982, he used "not so veiled language" to say "it's okay for a man to make fun of a woman's age," accusing Lautenberg of sexism in his race against GOP Congresswoman Millicent Fenwick:

Asked to cite a specific example of Lautenberg attacking Fenwick's gender, Andrews campaign manager Michael Murphy told Election Central, "I would not be able to say that he said, 'This person is incompetent to serve because she's a woman.'"

However, Murphy said of Lautenberg's age-based attacks used in that campaign: "It's virtually impossible, in projecting that message, to divorce that message from the fact that Millicent Fenwick was a woman."