Various primaries, nothing too big today. I will say one thing, though. Politicians are incredibly risk-averse, and not especially systematic in their research. If party-switching Rep. Parker Griffith loses his primary for renomination in Alabama today, on top of Arlen Specter's failed party-switching gambit...well, I suspect that it really will become a factor when the next pol thinks about switching. Never mind that Richard Shelby has been thoroughly successful as a party-switcher in the very same state, or that all sorts of party-switching success stories are available. Pols are likely. if they even know ancient stories about Phil Gramm, or Ben Campbell, or Ronald Reagan, to dismiss them: that was then, but nowadays look what happened to Specter and Griffith! On the other hand, if Griffith wins, then there's only the one point, and everyone knows it takes two points to make a trend.
So I'll be paying some attention to what happens in AL-5, because that obscure race really may have some affect on the future.