Premise: Hubert Horatio Humphrey Jr. ( May 27 , 1911January 13 , 1978 ) was an American politician who served as the 38th Vice President of the United States under President Lyndon B. Johnson from 1965 to 1969 . Humphrey twice served in the United States Senate , representing Minnesota from 1949 to 1964 and 1971 to 1978 . Humphrey served as mayor from 1945 to 1948 , he was reelected and became the co-founder of the liberal anti-communist group Americans for Democratic Action in 1947 . He served three terms in the Senate from 1949 to 1964 and was the Democratic Majority Whip from 1961 to 1964 . He became the first Deputy President pro tempore of the United States Senate and served until his death in 1978 .
Hypothesis: Hubert Humphrey served in at least one political position in the US.
Label: ENTAILMENT