Could quicker Rumsfeld exit have kept GOP in power?

The article is basically about speculations about whether or not Donald Rumsfeld's resignation could have helped the Republicans stay in power if it had been done before the Midterm Elections. I agree pretty much with Bolten when he states:

"I could argue the politics of it either way," White House Chief of Staff Joshua Bolten told CNN. "It might have been disheartening for people to see a sudden change at that moment, two or three weeks before the election. But however you view the politics of it, it doesn't matter. The president wasn't ready to make the decision until the last week. And he was determined not to inject politics into one of the most important national security decisions he has got to make."

I don't think it would have made much of a difference either way. Most people most likely would have shrugged it off and voted the way they wanted. Also, it has been discussed before on a few political cable news shows that a significant amount of people voted absentee, including me, so whatever the circumstance it would have been too late or fruitless to make an impact.