Back-to-Back Conventions: In the Great Unknown

What makes this particularly important is that the Obama-McCain race is tied, according to most polls, going into the Democratic convention. History suggests that the average convention gives its party a 10-point bounce. So what happens if the conventions afford identical 10-point swings and leave us, in September as in August, with a tied race, presaging a deadlock all fall?

One senses that the Republicans will be grateful if they can achieve a deadlock coming out of the conventions. They are justifiably afraid of Obama's charisma and skill at teleprompter speaking. It has been this ability that has held his candidacy up for all of 2008. His primary victories created a self-perpetuating cycle where each win laid the basis for another rousing victory speech, which spawned the next victory. In Berlin, he wove a similar magic and returned from Europe nine points ahead.

Two facts offer the GOP some comfort if the exchange of conventions yields comparable bounces and a deadlocked outcome. First, the Republicans have a great deal of ammunition left to fire. They really have not unloaded their main attacks yet, settling for more limited hits on Obama's celebrity status. When they unload attack ads focusing on Obama's tax program and on his naïveté, they are likely to score big. Second, each time an Obama bounce dissipates, voters must get more and more inured to the experience. An immunity will develop that will make voters less and less susceptible to his charisma. In any event, the convention will be Obama's last opportunity to speak with his beloved teleprompter. After that he's on his own!