Johnson called Alwaki "the first person to be denied" due process, and cautioned against similar attacks in the future.
"This is the first U.S. citizen that has ever been targeted for death by the United States government. So this is unprecedented, and I certainly at best have mixed feelings about this — this is why this country was established, was you can’t have a government going through the countryside rounding up citizens because they are a threat to the country and then putting them to death," Johnson said.
Johnson went on to say that giving the death sentence without due process "is not why this country is great." He did, however, say that he would continue drone attacks on non-American terrorist leaders as president.
Johnson's comments mirrored those of Ron Paul, who said that he didn't think the strike was "a good way to deal with our problems."
"If the American people accept this blindly and casually that we now have an accepted practice of the president assassinating people who he thinks are bad guys, I think it's sad," Paul said earlier Friday.