 Biden's age has continued to be a top concern for voters and poll after poll he has been struggling to best Trump in these battleground states. And so it's hard to see any way that this debate helps him. And the question is whether they are able to do the kind of damage control they need to do from now till November. Part of the calculus and having the debate as early as it is the first time we've had a presidential debate like this before the convention that the calculus there was to give