Crumbs I've seen indicate that Hussein was born in Kenya to an American father, so he has US citizenship. Q indicates that Hussein may try to claim Kenyan citizenship because only a US citizen can be charged with treason.
U.S. Code, Title 18, Part 1, Chapter 115
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.
Key phrase is "owning allegiance" to the US, which a Kenyan arguable would not have. But this might be defeated by the oaths taken by Hussein.
*owing. dang it's late.