A Californian who set up a vote-swapping Web site for supporters of Ralph Nader and Al Gore in 2000, before the state shut it down with a threat of prosecution, said Tuesday he may try again next year now that a federal appeals court has ruled that online vote-trading agreements are constitutionally protected. It all depends, Jim Cody said, on a candidacy by Nader or some other third-party hopeful that might siphon away enough votes from the Democratic nominee to tip the scales to a Republican in one or more states. His short-lived Vote Swap2000.com was meant to counteract that...