Robert Novak revealed this weekend that the long rumored sitting Democratic senator with a devastating scandal in his background is presidential candidate Barack Obama.

“Agents of Sen. Hillary Clinton are spreading the word in Democratic circles that she has scandalous information about her principal opponent for the party’s presidential nomination, Sen. Barack Obama, but has decided not to use it,” Novak reported. “The nature of the alleged scandal was not disclosed.”

The Clinton campaign has denied it has such information, but, still, tongues are wagging. Could Obama have cheated on his wife, Michelle, which is the most likely scandalous scenario? Or is something even more sinister involved?

For his part, Obama was quick to strike back, calling the Novak article “slime politics.”