It doesn't - but neither does many things associated with either candidate.

Gen. Clark's opinion is his, just as mine is mine and your's is your's. It carries as much weight (maybe less).

Gen. Clark has been highly inconsistent in his endorsements and the logic behind them. He's appeared to have tried positioning himself as a potential candidate, and fallen flat on his keister. Trying to keep himself in the public eye seems to have been his main goal, and the more flamboyant the remarks, the longer the period in the limelight.

As we get closer to the Vice Presidential selection (what's really the news for the conventions!), the more we shall hear from people like Gen. Clark, who would like nothing better than a shot at V.P., or if Sen. Obama wins and he (Gen. Clark) doesn't get the V.P. nod, a shot at SecDef, SecState, or SecDHS as a consolation prize.