18 U.S. Code § 713 - Use of likenesses of the great seal of the United States, the seals of the President and Vice President, the seal of the United States Senate, the seal of the United States House of Representatives, and the seal of the United States Congress https://www.law.cornell.edu/uscode/text/18/713#

Great Seal of the United States https://en.wikipedia.org/wiki/Great_Seal_of_the_United_State...

Seal of the president of the United States https://en.wikipedia.org/wiki/Seal_of_the_president_of_the_U...