Trump may go ballistic over this.
House Speaker Nancy Pelosi (D-Calif.) on Wednesday asked President Trump to postpone his State of the Union address or deliver it in writing because of the partial federal government shutdown.
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Some info from Wikipedia..
The practice arises from a duty given to the president in the Constitution of the United States:
He shall from time to time give to Congress information of the State of the Union and recommend to their Consideration such measures as he shall judge necessary and expedient.
Article II, Section 3 of the U.S. Constitution
More...The reason the Speaker invites the President is because the address is held in the House chambers.A formal invitation is made by the Speaker of the House to the President several weeks before each State of the Union Address.[17][18]