The Federalist Society gave Trump the list he's allowed to choose from, and they don't really care. So yeah, they could have lined up any drone that would do the same thing for them.
But I suspect Trump just didn't want to back down (because he's an egomaniac), and incidentally Kavanaugh wrote an opinion in 2009 saying he doesn't think sitting presidents should be indicted. Also conveniently changed his mind (after railing against Clinton) on expanding the presidency's power when he started working for Bush.
It's already paying dividends, as today Kavanaugh pretty much said the federal govt. can detain immigrants indefinitely w/o bail hearings, that their power to do so is unfettered & in fact intended to be harsh in its application. Even fellow Trump appointee, Gorsuch, seemed troubled by it. Due process lovers curiously not minding this.
https://t.co/DWhEqYHdft