The Trump–Ukraine scandal was a U.S. political scandal that arose from the discovery of U.S. President Donald Trump's attempts to coerce Ukraine and other countries into providing damaging narratives about 2020 Democratic Party presidential candidate Joe Biden and giving misinformation relating to Russian interference in the 2016 United States elections. Trump enlisted surrogates within and outside his official administration, including his personal lawyer Rudy Giuliani and Attorney General William Barr, to pressure Ukraine and other foreign governments to cooperate in supporting conspiracy theories concerning American politics. Trump blocked payment of a congressionally-mandated $400 million military aid package in an attempt to obtain quid pro quo cooperation from Ukrainian president Volodymyr Zelenskyy. Trump released the aid after becoming aware of a whistleblower complaint about his activities relating to Ukraine, before the complaint was known by Congress or the public. A number of contacts were established between the White House and the government of Ukraine, culminating in a phone call between Trump and Zelenskyy on July 25, 2019.

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.