Bob Novak reports at TownHall.com:

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. The nature of the alleged scandal was not disclosed.

Novak interprets this as a campaign stratagem which “makes Obama look vulnerable and Clinton look prudent.” But I wonder if this is not actually a threat, promising assured retaliation if the Obama camp resorts to using a scandal involving Hillary, reportedly being suppressed at the present time by the MSM.