Democrats and Republicans voiced anti-incumbent sentiments with their votes during Tuesday's primary elections. Jim Lehrer talks to two political writers about the loss by longtime Pennsylvania Senator Arlen Specter and the high stakes for several more veterans.

Tuesday's primary elections in Pennsylvania, Kentucky and Arkansas ended with a veteran Senator out of the race, another forced into a runoff and a third facing a Tea Party outsider. Jim Lehrer reports on what these primaries mean for the…

Incumbent Blanche Lincoln is campaigning to hold on to her seat in the U.S. Senate in a heated Democratic primary race in Arkansas. Spencer Michels reports on how the state's agriculture industry and discontent with Washington may factor into the…

Senate Democratic leaders celebrated Saturday when their health care reform bill passed a key procedural hurdle, but by Monday deep divisions over some key provisions of the $848 billion legislation were already back in the spotlight.