Peter Paul Montgomery Buttigieg is an American politician and former naval officer who is currently serving as the 19th United States Secretary of Transportation. A member of the Democratic Party, he was the 32nd mayor of South Bend, Indiana, from 2012 to 2020, which earned him the nickname "Mayor Pete".

The 2020 Iowa Democratic presidential caucuses, the first nominating contest in the Democratic Party primaries for the 2020 presidential election, took place on February 3, 2020. Pete Buttigieg received the most state delegate equivalents (SDEs) and therefore the most delegates, with one SDE and two delegates more than Bernie Sanders, who had narrowly won the popular vote with 26.5%. It was the first time that the Iowa caucuses published the popular vote results of their contest. Buttigieg became the first openly gay person to ever earn the most delegates in a state's presidential contest in the United States. The Iowa caucuses were closed caucuses, wherein only registered members of a party were eligible to vote, and awarded 49 delegates to the 2020 Democratic National Convention, of which 41 were pledged delegates allocated on the basis of the results of the caucuses.