Nervous Democrats are on defense and emboldened Republicans sense opportunity heading into 2010 and the midterm elections. It was just three years ago that the GOP lost the House and Senate as well as governors' races in a cross-country Democratic wave.
Now, with most states under their control and comfortable majorities in Congress, Democrats must protect far more seats than Republicans: 19 governors' mansions, 17 Senate seats and as many as 60 House districts in moderate-to-conservative regions and swing-voting areas.
