As members of this Administration have previously indicated, the U.S. government has not carried out drone strikes in the United States and has no intention of doing so. As a policy matter, moreover, we reject the use of military force where well-established law enforcement authorities in this country provide the best means for incapacitating a terrorist threat.
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The question you have posed is therefore entirely hypothetical, unlikely to occur, and one we hope no President will ever have to confront.