WASHINGTON (AP) - Senate gridlock is making it hard for senators to claim legislative achievements as they run for re-election.
The logjams may boost Republicans' hopes of gaining the six seats they need this fall to claim the Senate majority.
The closest races involve Democrats from states that President Barack Obama lost. Republicans denounce these Democrats as do-nothing politicians.
Incumbents traditionally cite feel-good bills they have guided into law. But many such bills often die now because of partisan battles over amendments.
Republicans want to make Democrats cast uncomfortable votes on sensitive matters unrelated to the bill at hand.
Senate Democratic leaders often kill the bills rather than give Republicans that opportunity.
Democratic senators say they are finding other ways to help their constituents in Washington.