Good point Mrs. RQSR to have the SOTU in the Senate so Pence, and McConnell would be behind DJT at the podium instead of Pelosi, and McCarthy.
I personally would like the president to address the Nation from the Oval Office, and take it away from the Democrat House who will find a way to screw up the works no matter what, but doing it in the Senate would be OK too. The House is supposed to be the peoples voice, but with Democrats in charge it is the voice of the DNC.
In the House chamber the Vice President and the Speaker sit behind the President.