Explain why Obama couldn't legally use a targeted drone strike here in the US..

[lumberjack_jeff]

Pursuant to the AUMF to execute those they suspect of terrorism?

Section 1 - Short Title
This joint resolution may be cited as the 'Authorization for Use of Military Force'.

Section 2 - Authorization For Use of United States Armed Forces
(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.
(b) War Powers Resolution Requirements-
(1) SPECIFIC STATUTORY AUTHORIZATION- Consistent with section 8(a)(1) of the War Powers Resolution, the Congress declares that this section is intended to constitute specific statutory authorization within the meaning of section 5(b) of the War Powers Resolution.
(2) APPLICABILITY OF OTHER REQUIREMENTS- Nothing in this resolution supercedes any requirement of the War Powers Resolution.

The only check on this behavior are practical and political considerations.