What Trump's State of the Union says about his reelection prospects

U.S. President Donald Trump delivers the State of the Union address to a joint session of the U.S. Congress in the House Chamber of the U.S. Capitol in Washington, U.S., February 4, 2020. Credit: REUTERS/Joshua Roberts.

Before President Trump started his State of the Union speech on Tuesday night, Republican Congress members chanted “four more years!” The president opened his 2020 reelection bid on the biggest stage possible, with an audience of millions. 

What is the political lay of the land in 2020 -- post-impeachment, post-Iowa caucuses, and post-State of the Union?