Articles of Treason:
The United States Code at 18 U.S.C. § 2381 states; Whoever, owing allegiance to the United States, levies war against them or adheres to their enemies, giving them aid and comfort within the United States or elsewhere, is guilty of treason and shall suffer death, or shall be imprisoned not less than five years and fined under this title but not less than $10,000; and shall be incapable of holding any office under the United States of America.
He's blatantly called for war against the USA on his twitter page. This is outrageous and disgusting. Since he feels comfortable spewing his racist chant. He must have forgot it's a crime to levy war against the United States. The President is the primary representative of the United States and therefore it's a direct threat.