Three prominent U.S. senators will monitor tomorrow's crucial legislative elections in Pakistan.

Foreign Relations Committee Chairman Joseph Biden will join 2004 Democratic presidential nominee John Kerry and Republican Chuck Hagel in a visit aimed at helping make sure the vote is fair. Biden predicts a rigged election would spark rioting throughout Pakistan. And he says if it's determined the vote is not fair, the U.S. should cut Pakistan's military aid.

Secretary of State Condoleeza Rice says U.S. Embassy staffers and European officials will be among the outsiders observing the balloting. She says the election must inspire confidence that Pakistan's citizens can vote freely.