Item: Did Letterman go too far with Willow Palin joke/Los Angeles Times

More Info: However, Monday's show has drawn criticism from both sides of the aisle for a joke made about Sarah Palin's 14-year-old daughter, Willow. During his opening monologue, Letterman poked fun at Sarah and Willow's recent weekend outing to a Yankees game, joking that, "during the seventh inning, her daughter was knocked up by Alex Rodriguez." The joke is a reference to Sarah Palin's other daughter, Bristol, whose unwed pregnancy was made a focal point of the 2008 presidential elections. Despite the numerous jokes made about Sarah Palin during her campaign, comedians generally avoided making jokes about her children. Public figures may be fair game, but children of politicians are usually considered off-limits.

Question: What did you think? Did Letterman cross the line?