The U.S. intelligence community policy on killing American citizens who have joined al Qaeda requires first obtaining high-level government approval, a senior official disclosed to Congress on Wednesday.
Director of National Intelligence Dennis C. Blair said in each case a decision to use lethal force against a U.S. citizen must get special permission. . . .
He also said there are criteria that must be met to authorize the killing of a U.S. citizen that include "whether that American is involved in a group that is trying to attack us, whether that American is a threat to other Americans. Those are the factors involved."
Tl:dr
The president has the ability to order the assassination of any American citizen without the approval of the courts or congress.
And then it goes on to describe why that's ****ed up in case that wasn't tremendously obvious.