Although American Samoa did not participate in the 2020 presidential election because it is a U.S. territory and not a state, it still participated in the U.S. presidential primaries and caucuses. Former mayor Michael Bloomberg won the Democratic caucus, held on March 3. The Republican caucus, in the form of a territorial convention held on March 18, endorsed incumbent President Donald Trump.

Michael Rubens Bloomberg is an American businessman, politician, philanthropist, and author. He is the majority owner and co-founder of Bloomberg L.P., and was its CEO from 1981 to 2001 and again from 2014 to 2023. He served as the mayor of New York City for three terms from 2002 to 2013 and was a candidate for the 2020 Democratic nomination for president of the United States. In 2024, Bloomberg received the Presidential Medal of Freedom from President Joe Biden. He has served as chair of the Defense Innovation Board, an independent advisory board that provides recommendations on artificial intelligence, software, data and digital modernization to the United States Department of Defense, since June 2022.