Could Obama have Hagel killed in a drone strike on American soil?

I'm just wondering, that's all because it could calm a few Israel lobby nerves if Obama had Hagel killed.  And according to this Glenn Greenwald Guardian Comment is Free piece there appears to be no law preventing Obama from having anyone from anywhere killed anywhere:

The Justice Department "white paper" purporting to authorize Obama's power to extrajudicially execute US citizens was leaked three weeks ago. Since then, the administration - including the president himself and his nominee to lead the CIA, John Brennan - has been repeatedly asked whether this authority extends to US soil, i.e., whether the president has the right to execute US citizens on US soil without charges. In each instance, they have refused to answer.

Brennan has been asked the question several times as part of his confirmation process. Each time, he simply pretends that the question has not been asked, opting instead to address a completely different issue. Here's the latest example from the written exchange he had with Senators after his testimony before the Senate Intelligence Committee; after referencing the DOJ "white paper", the Committee raised the question with Brennan in the most straightforward way possible:

Obviously, that the US has not and does not intend to engage in such acts is entirely non-responsive to the question that was asked: whether they believe they have the authority to do so. To the extent any answer was provided, it came in Brennan's next answer. He was asked:

Could you describe the geographical limits on the Administration's conduct drone strikes?"

Brennan's answer was that, in essence, there are no geographic limits to this power: "we do not view our authority to use military force against al-Qa'ida and associated forces as being limited to 'hot' battlefields like Afghanistan." He then quoted Attorney General Eric Holder as saying: "neither Congress nor our federal courts has limited the geographic scope of our ability to use force to the current conflict in Afghanistan" (see Brennan's full answer here).

Revealingly, this same question was posed to Obama not by a journalist or a progressive but by a conservative activist, who asked if drone strikes could be used on US soil and "what will you do to create a legal framework to make American citizens within the United States believe know that drone strikes cannot be used against American citizens?" Obama replied that there "has never been a drone used on an American citizen on American soil" - which, obviously, doesn't remotely answer the question of whether he believes he has the legal power to do so. He added that "the rules outside of the United States are going to be different than the rules inside the United States", but these "rules" are simply political choices the administration has made which can be changed at any time, not legal constraints. The question - do you as president believe you have the legal authority to execute US citizens on US soil on the grounds of suspicions of Terrorism if you choose to do so? - was one that Obama, like Brennan, simply did not answer.

This is the kind of nonsense that has fans of Obama calling him a great communicator when he's transparently a complete tosser.  Woops, wrong word. Not transparently, obviously a complete tosser.