THE UNITED STATES CONSTITUTION
Article III
Section 3
1: Treason against the United States, shall consist only in levying War against them, or in adhering to their Enemies, giving them Aid and Comfort. No Person shall be convicted of Treason unless on the Testimony of two Witnesses to the same overt Act, or on Confession in open Court.
Amendments to the Constitution
Article [II]
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.
As long as the United States is engaged in wars Obama is giving aid to the enemy by violating the right of the people under the Second Amendment.