Live: Donald Trump's second impeachment trial in the US Senate

Donald Trump's impeachment trial lawyer has turned in a mystifying performance, with even the former president's supporters left baffled.  

Welcome to our live coverage of Donald Trump's second impeachment trial.

We have reached the end of day one, and the Senate has voted that the trial is indeed lawful under the US Constitution, by a margin of 56-44. That means the Democrats' impeachment managers will start to make their case tomorrow, with Mr Trump's defence to follow later in the week.

Read on to see how the day unfolded.