Neither rookies nor seasoned veterans were spared in Tuesday's House Democratic bloodbath, which saw Republicans defeat three major committee chairmen and at least seven lawmakers who claimed 20 years' seniority or more in Congress. While the losses of 16 freshmen "Obama babies" — those elected during the president's 2008 sweep — were expected, the number of long-serving Democrats who lost re-election this week is staggering, and suggests a widespread dissatisfaction with Washington. All told, with about a dozen races still uncalled, Democrats have already shed 376 years of congressional experience, and that could go as high as 430 years if...