Trump will be first president since Nixon to miss successor's inauguration

Only seven former US presidents did not attend the event, violating a democratic norm

Donald Trump, the first US president to have been impeached twice, refuses to attend president-elect Joe Biden's inauguration this Wednesday.

He is one of seven US presidents ever to have done so, joining the company of John Adams, John Quincy Adams, Martin Van Buren, Andrew Johnson, Woodrow Wilson, and most recently, Richard Nixon. Wilson had had a stroke and Nixon had resigned. Presidents have seldom rejected this norm of attendance, usually seen as an important symbol of the peaceful transition of power.