CQ Politics did a post-primary assessment of the 2010 House races and has moved the seats of seven Democratic incumbents into the ‘Lean Republican’ column. See if you can detect a pattern:
Colorado 4th — Rep. Betsy Markey (elected ‘08)
Florida 24th — Rep. Suzanne M. Kosmas (elected ‘08)
Illinois 11th — Rep. Debbie Halvorson (elected ‘08)
Maryland 1st — Rep. Frank Kratovil Jr.(elected ‘08)
Ohio 1st — Rep. Steve Driehaus (elected ‘08)
Ohio 15th — Rep. Mary Jo Kilroy (elected ‘08)
And finally there is…
Texas 17th — Rep. Chet Edwards (elected ‘90) — Which CQ calls “without a doubt, the most difficult rating change to make.” More on Edwards here.