I agree with Matt on this one
. It is extremely important for the Democrats to nominate someone who doesn't think like a loser. And assuming that any failure of the president's anti-terrorism policies will automatically be a political boon for the Republican party means thinking like a loser.
It also signals a lack of confidence either in your own policies or the American people's reasoning powers. And quite possibly both. And whether or not your policies make sense and whether or not the American people know jack you just can't be an effective advocate of those policies unless you think average Americans can be persuaded that they make sense.
Otherwise, you are permanently off balance, ill-prepared and incoherent.