It is A) William Jennings Bryan was the presidential candidate that ran for the anti-imperialist platform. He never won any presidential election.
William McKinley is your answer because he defeated Bryan who was in a campaign focused on imperialism, prosperity, and free silver.
William Jennings Bryan was the presidential candidate who ran on an anti-imperialist platform. He opposed American imperialism during the late 19th and early 20th centuries. Although he was nominated three times, he was never elected president.
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