Giving the address from the border is not a bad idea. Trump can give the address to the nation. He doesn’t have to address Congress in person. Or he could give it to the Senate.
From Wikipedia...
“The address fulfills rules in Article II, Section 3 of the U.S. Constitution, requiring the President to periodically “give to the Congress Information of the State of the Union, and recommend to their Consideration such measures as he shall judge necessary and expedient.”[1] During most of the country’s first century, the President primarily only submitted a written report to Congress. After 1913, Woodrow Wilson, the 28th U.S. President, began the regular practice of delivering the address to Congress in person as a way to rally support for the President’s agenda.[1] With the advent of radio and television, the address is now broadcast live across the country on many networks.[4]”
Teleconference the speech from the border wall groundbreaking into the gathered house chamber. Lock them in while they are watching.