The State of the Union is a constitutionally mandated responsibility of the president. Trump should borrow a tactic from the dems and file a lawsuit with a tame judge. Ask the judge to declare Pelosi’s action unconstitutional.
Except there is a more than 100 year tradition of the president merely sending a letter to the House and Senate. What we think of as a SOTU speech is an invention of the radio/television age. Kabuki theater.