Walter Mondale served as the US vice president under the reign of President Jimmy Carter. He became the VP of US in 1977 and remained in the post until 1981. He belonged to the Democratic party.
He held several posts before becoming the vice president, including US Senator from Minnesota and 24th United States ambassador to Japan. After his tenure as VP, he ran for the presidential election race from the Democratic party and became the for US presidential candidate in the 1984 elections but lost to incumbent Ronald Reagan.
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In 1984 presidential elections, Jimmy Carter was a very popular candidate but he did not run instead endorsed Walter Mondale. Though he supported Mondale throughout his elections, he predicted that he would lose because of his platform raising taxes.