Since the important part wasn’t posted....
http://www.law.cornell.edu/uscode/html/uscode18/usc_sec_18_00000713——000-.html
18 USC Sec. 713 …
(a) Whoever knowingly displays any printed or other likeness of the great seal of the United States, or of the seals of the President or the Vice President of the United States, or the seal of the United States Senate, or the seal of the United States House of Representatives, or the seal of the United States Congress, or any facsimile thereof, in, or in connection with, any advertisement, poster, circular, book, pamphlet, or other publication, public meeting, play, motion picture, telecast, or other production, or on any building, monument, or stationery, for the purpose of conveying, or in a manner reasonably calculated to convey, a false impression of sponsorship or approval by the Government of the United States or by any department, agency, or instrumentality thereof, shall be fined under this title or imprisoned not more than six months, or both.
(b) Whoever, except as authorized under regulations promulgated by the President and published in the Federal Register, knowingly manufactures, reproduces, sells, or purchases for resale, either separately or appended to any article manufactured or sold, any likeness of the seals of the President or Vice President, or any substantial part thereof, except for manufacture or sale of the article for the official use of the Government of the United States, shall be fined under this title or imprisoned not more than six months, or both.
It is clear that he used the seal to send the false impression that he was already the President. That’s the whole point — to make him look presidential.
So it’s clear he has violated the law. On the other hand, he’s a Democrat, so laws don’t really apply to him. Plus, he’s black (in case you didn’t notice), so it would be racist to claim he broke the law.