FDR was the first and only president to serve more than two terms. Passed by Congress in 1947, and ratified by the states on February 27, 1951, the Twenty-Second Amendment limits an elected president to two terms in office, a total of eight years.
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Hitler, the first year he was elected president he began "ethically cleansing" Germany of Jewish people, as he described it in his diaries. He is the main cause of world war 2 so naturally he is the most influential.
Explanation:
oooh I'm pretty sure this is spain