Wikimedia
Wikipedia: Ralph Nader
A thorough encyclopedic biography of Ralph Nader, covering his early life, his activism, and his third-party candidacy in four presidential elections.
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Us News and World Report: Teddy Roosevelt, on the Bull Moose Party Ticket
A great explanation of the divide in the Republican Party in the campaign of 1912, which resulted in Theodore Roosevelt becoming a third-party candidate. Read about the vying between two Progressives, one Democratic and one previously...