The Constitution requires the President https://en.wikipedia.org/wiki/State_of_the_Union to report to Congress on the "State of the Union". The Constitution is vague on the manner of reporting and the frequency:
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
In recent times the reporting has been by a speech to the combined House and Senate, with widespread media coverage.
In making this Constitutionally mandated report to Congress, is the President subject to perjury charges if he should lie to Congress?