Here are the provisions under which these drones are unleashed:
The Authorization of Use of Military Force:
(a) IN GENERAL- That the President is authorized to use all necessary and appropriate force against those nations, organizations, or persons he determines planned, authorized, committed, or aided the terrorist attacks that occurred on September 11, 2001, or harbored such organizations or persons, in order to prevent any future acts of international terrorism against the United States by such nations, organizations or persons
1. Clearly the Authorization states that limits apply to what the President may do. The Supreme Court, by enforcing International Treaties, has the duty to enforce limits.
2. Clearly these powers have a sunset clause, that is the AUMF is current until acts of international terrorism against the US are deemed to have been prevented. Again, the Supreme Court is the only body qualified to make that determination.
3. The AUMF enables use of military force only against INTERNATIONAL terrorism. By definition, from the point of view of the US, American citizens can only engage in DOMESTIC terrorism, a threat explicitly excluded by the AUMF. The Supreme Court is entitled to enforce that limitation.