"It's all bollocks, of course. Republicans just want to psyche you out. They want you to think they can't be defeated. They want you to doubt yourself, to stumble, to give up. But there are way too many variables at play. Iraq, the economy, terrorism--it's a confluence of events which hasn't come together like this before. We're in uncharted territory.
The future hasn't been written yet. Don't forget that."
Especially about the variables at play part.