This post marks the 500th in Politics Nation's short lifespan. Since September 17, it's been our pleasure to keep you up to date on the latest news and notes from races around the country, and we look forward to the next 500 posts. Actually, the way this election season is shaping up, it's likely to be closer to 5,000 before we're finished.

A few ways to keep your finger on the pulse of Politics Nation: Join our Facebook group, now hundreds strong and growing. And sign up for Twitter, which we admit we're just getting used to. You'll get quick one- or two-sentence updates when news breaks, instantly, and be in the know before anyone else.

Again, thank you for making Politics Nation a success. Please come back often, and as always, we're happy to answer any questions. Feel free to email any time with tips, hints, suggestions, corrections and angry rants. Now, for the 501st post...