The U.S. State of the Union address takes place in Washington on Tuesday. 

President Donald Trump delivers his speech at the Capitol – in what will be a historic address.

One political observer says it's unprecedented to have a State of the Union speech from an impeached president running for re-election.

The State of the Union is an opportunity for the president to trumpet his achievements of the past year and outline goals for the coming 12 months.

What's the State of the Union? What role will the impeachment play? Here's what you need to know.