Joseph Robinette Biden Jr. is an American politician who is the 46th and current president of the United States. A member of the Democratic Party, he served as the 47th vice president from 2009 to 2017 under Barack Obama and represented Delaware in the United States Senate from 1973 to 2009.

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They were re-elected for new four-year terms on November 6, 2012, defeating the Republican ticket of Mitt Romney and Paul Ryan. After Biden and Obama stepped down at the end of two terms, they were succeeded by Republican president Donald Trump and vice president Mike Pence. Four years after leaving office, Joe Biden was chosen as the Democratic nominee for U.S. president in the elections of 2020. He chose Senator Kamala Harris of California as his running mate, and together they defated incumbents Trump and Pence in the general elections of 2020. Joe Biden took office as U.S. president on January 20, 2021.