Normally, I don’t say anything about such things, but then a friend pointed out the license plate frame on the shooter’s truck. (See the join the tea party dot us URL?)
From reports, this is not a politically motivated shooting, and I have no reason to believe that it is.
That being said, what is clear is that there are a lot of teabaggers with easy access to firearms and a few screws loose, and there are a lot of people out there who are giving encouragement for them to go postal (Limbaugh, Beck, O’Reilly), and the fact that a few of them are going do decide to do very bad things as a result is more probable than just possible.
H/t Hedgehog at SP.