The Republicans are not interested in governing all of the people just the pluarity who agree with their Right-Wing, Wacko Agenda.
"And though they [The Republicans] fully expect to lose seats, they are also keeping their fingers crossed. They are counting on a barrage of last-minute advertising and their 72-hour voter turnout operation to keep Democrats from taking over the House and Senate, even if it means they only eke out a victory." S. Stoldberg, J. Rutenberg NYT October 22, 2006
They are interested in governing for only people who agree with their radical agenda (which currently stands somewhere around 35% - 40% of the electorate) through maintaining even a 1 vote margin in both houses of congress.
I say use this against them in a final blitz national ad that starts out with a quote of GWB and Rove saying that we are going to maintain both houses. Go to another quote that says well "They" (whoever they are) are just wrong.
End with do you want the GWB administration to listen to your concerns? Only Democrats will force the GWB to listen to your concerns. Vote Democrat or else your voice will only be heard if you agree with everything GWB and Karl Rove say.
I think that could nationalize the election for the Democrats and have all Democratic candidates pledge to work with the Administration to fix the problems in this country. Not be afraid to tell the Administration when they are wrong and not be afraid to stand up for you the American People.
If done right could be a powerful closing argument and a GOTV enabler.