Supporters of President Trump storm the United States Capitol building on Jan. 6, 2021, in Washington DC. (Evelyn Hockstein/For The Washington Post via Getty Images) On Tuesday, Donald Trump's impeachment trial begins in the U.S. Senate. Last month, Trump was impeached by the House of Representatives for inciting an armed insurrection and attack on the Capitol that left at least five people dead (including one police officer). Two other Capitol police officers have subsequently committed suicide, apparently because of the trauma of that day. Dozens of other people were injured, (including at least 140 police and other law enforcement agents).