As the US National Guard were standing guard in Washington DC ahead of Preident-Elect Biden’s inauguration on 20th January 2021, the US Senate voted to impeach President Trump for inciting the mob that breached Congress last week. Five people died in the violence.
https://www.bbc.co.uk/news/world-us-canada-55658517
https://www.theguardian.com/us-news/2021/jan/14/national-guard-move-in-to-washington-dc-for-inauguration-day
https://www.bbc.co.uk/news/world-us-canada-55575260
This means that President Trump will face trial by the US Government for the second time in his presidency, which has never happened before. If he is convicted, he could be barred from holding public office again, meaning he’d never be able to run for President again.