Donald Trump's first tenure as the president of the United States began on January 20, 2017, when Trump was inaugurated as the 45th president, and ended on January 20, 2021.
Trump, a Republican from New York, took office after defeating the Democratic nominee Hillary Clinton in the 2016 presidential election. Upon his inauguration, he became the first president in American history without prior public office or military background. Trump made an unprecedented number of false or misleading statements during his 2016 campaign and first presidency. Alongside Trump's first presidency, the Republican Party also held their majorities in the House of Representatives and the Senate during the 115th U.S. Congress following the 2016 elections, attained an overall federal government trifecta. His presidency ended following his defeat to former Democratic vice president Joe Biden in the 2020 presidential election.