First, I am going to get around to deleting spam comments.
Second, I will be posting more data. At some point. I have had other things on my mind.
But! Here is something to tide you over.
As we look towards the 2010 house elections, there are two major trends: first, the demographic trend starting in the late 1980s, where the union voters in the midwest and the traditionally Democratic voters in the south switched to the Republican party. Second, there is the event driven growth of the Democratic Party in 2006 and 2008. The last two elections could also be demographic, as urban and educated voters switch to the Democratic Party.
So which is the "true" trendline? Ask me in a little under three months!