Divide and conquer!
I have doubts about the wisdom of this stratergy.
It might help re-elect GW, but it helps Democrat Senators get out of Kerry's implosive radius. This doesn't help us get that filibuster-proof majority we need in the US Senate.
I'd rather keep our enemies in our sights and close to the implosive charges so that when they ultimately go off (the coming Kerry implosion should hit in October) they will get taken down in the aftermath.