A Brief Update on 117 House Races October 18, 2010 2:57 P.M. By Jim Geraghty Tags: 2010 As promised, here is a quick update on that May list of 99 open seats or vulnerable Democrats. As you can see, quite a few have been added; we’re now up to 117. (I added one, WA-2, after initial posting.) However, this list includes some races that appeared as potentially competitive earlier and now aren’t, such as Rep. Dan Boren’s reelection bid in Oklahoma. My current assessment is in line with the conventional wisdom: Roughly 100 seats are in play under the broader...