Senate Sergeant of Arms Michael Stenger opened just the third impeachment trial of a US president in history with a warning to the 100 senators.
Before the vote, Trump, who has labelled the House impeachment a political witch hunt, accused Democrats of a ‘con job’.
For weeks Pelosi left Democrats and Republicans alike guessing what and when her next move would be.
Asked if he took any responsibility for the crisis, Trump said: ‘I don’t take any, zero to put it mildly’.
Trump, who insists there is a witch hunt against him, called the panel’s impeachment vote ‘an embarrassment to our country’.