cayenne8 writes "During the 2000 election, some sites were set up for people across the nation to agree to swap votes, among them voteswap2000.com and votexchange2000.com. They were established mainly to benefit the third-party candidate Ralph Nader without throwing local elections to George Bush. The state of California threatened to prosecute these sites under criminal statues, and many of them shut down. On Monday the 9th Circuit Court of Appeals ruled that the vote-swap sites were legal (ruling here, PDF). The court held that '...the websites' vote-swapping mechanisms as well as the communication and vote swaps they enabled were constitutionally protected' and California's spurious threats violated the First Amendment. The 9th Circuit also said the threats violated the US Constitution's Commerce Clause.'"