I wouldn't say that I'm totally happy with republicans all the time. But I remember the infantile and embarrassing actions of the the democrats during the SOTU speech; especially when Bush was talking about Social Security.
The way the dems reacted at that exact moment just reaffirmed to me that I will NEVER in my life vote for or support a dem. It was a moment that perfectly summarized the vindictive, petty, and immature nature of democrats everywhere. I imagine that alot of independent swing type voters saw this and came to similar conclusions.