Leave it to Baltimore's own Sinclair Broadcast to run the ad tarring Barack Obama for his acquaintance with Bill Ayers, the Weather Underground jerk whose group bombed the Capitol and the Pentagon (with little effect) in the early 1970s. Obama lives in the same neighborhood with the guy, who apparently has rehabilitated himself and is now a professor at the University of Illinois/Chicago.
Ayers had a "meet the candidate" session at his house for Obama in the 1990s when Obama was first running for office. And Obama was on the board with Ayers of the Chicago Annenberg Challenge, an education-reform group financed by the well-known radical-pinko Walter Annenberg. (Annenberg was the billionaire who founded TV Guide and was Richard Nixon's ambassador to Britain when Ayers was bombing Nixon's Pentagon. Annenberg was also a close friend of Ronald Reagan.) So now Obama is being linked to terrorism.
Sinclair has a history of this, having fanned the Swift Boat flames four years ago. Every candidate has ties to dubious characters. If you're a politician you rub elbows with tens of thousands of people, and some of them turn out to be questionable. You can't fault Obama's ties to Ayers any more than you can fault John McCain's ties to the Rev. John Hagee, the much-criticized megachurch pastor. The left likes to complain that the American news media is a corporate monolith. Sinclair is an outlier, but I don't think that's the kind of diversity liberals have in mind.