The 115th United States Congress was a meeting of the legislative branch of the United States of America federal government, composed of the Senate and the House of Representatives. It met in Washington, D.C., from January 3, 2017, to January 3, 2019, during the final weeks of Barack Obama's presidency and the first two years of Donald Trump's presidency. The seats in the House were apportioned based on the 2010 United States census.

Donald Trump's tenure as the 45th president of the United States began with his inauguration on January 20, 2017, and ended on January 20, 2021. Trump, a Republican from New York City, took office following his Electoral College victory over Democrat nominee Hillary Clinton in the 2016 presidential election, in which he lost the popular vote to Clinton by nearly three million votes. 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 campaign and presidency. His presidency ended following his defeat in the 2020 presidential election to former Democratic vice president Joe Biden, after one term in office.