This bold new ad, released by Democracy for America, which was founded by Howard Dean, and Brave New Pac, which is associated with filmmaker Robert Greenwald, raises questions about John McCain's health. According to this article in The New York Times by Jim Rutenberg, the ad is running on MSNBC, but has been rejected by CNN.

Ad about McCain's Medical Records:"

UPDATE (9/26): According to Talking Points Memo, MSNBC pulled the ad after complaints from viewers, and from Bill O'Reilly.

1988 Dukakis Ad Ties President's Mortality to Vice-Presidential Pick: