It’s the start of a crucial week for President Trump as public hearings begin in the impeachment inquiry – investigating whether Mr Trump put pressure on Ukraine to investigate his Democratic rival Joe Biden.
And crucially – if he violated his oath of office, by asking a foreign power to help his re-election campaign, while withholding military aid.
Our Washington correspondent Siobhan Kennedy explains what’s at stake.
In This Story: Donald Trump
Donald John Trump is the 45th and current president of the United States. Before entering politics, he was a businessman and television personality. Trump was born and raised in Queens, a borough of New York City, and received a bachelor’s degree in economics from the Wharton School.