I love this mail that just came out from the Kerry campaign:
President Bush has the opportunity to achieve an average, or even greater, bounce from his convention. Typically, elected incumbents go into their conventions with a 9-point lead, while incumbents who have gone on to win enter their conventions with a 21-point lead. Most current polls show the race quite close. This gives the president substantial room to bounce.
Oh, yes, set those expectations. Hah!
Doesn't seem to be up on the Kerry site yet. It's a lovely box they've built for him.
However, as the data above makes clear, average is not enough for President Bush. Incumbents who went on to win reelection had an average lead of 27 points after their convention. Indeed, the average elected incumbent -- winners and losers -- had a lead of 16 points after their conventions. An average bounce would still leave Bush well below the historical mark set by other incumbents, particularly those who went on to victory.
Perhaps most important, the average elected incumbent experienced a 4-point drop in his share of the two-party vote from the post-convention polling to Election Day. Thus, to beat the odds, President Bush will need to be garnering 55% of the two-party vote after his convention. Anything less than that and the president will remain in grave political danger.
Bush in grave political danger. Oh no. Whatever shall we do.