There won’t be a State of the Union message in 2020 in the conventional manner. Pelosi isn’t going to extend and invitation to a President under “impeachment inquiry”. More optics for her base.
Before Woodrow Wilson, the State of the Union message was a letter from the President to Congress, and it was read by the Clerks of the two Houses to their members. It was Wilson who turned it into an event.
It should go back to being a letter.