Clinton’s presence on the ticket may be able to gin up Republican fundraising…except, because they are taking public financing, the McCain campaign will have precisely one week to both collect AND spend that money.
In short, absent some increase in RNC money and possibly 527 money, for the most part McCain’s advantage here would be completely neutralized by the clock. If Hillary had been the VP nominee all summer long the Republicans would be dining out on this–but now they simply would not have enough time to do it.
Now, obviously Obama didn't choose Clinton--and at the same time, much crowing has come from the McCain camp about how much money they've raised based on picking Palin.
But their problem is: they are about to run out the same clock as I outlined above!
It is important to note, however, that after McCain makes his acceptance speech Thursday, he can no longer use any money raised previously. This is referred to as "primary" money.