I disagree - German Generals under Hitler were about to do just that, and Obama is no where near as slick as Hitler.
I do not doubt there is a group of them aware of the situation and ready to depose him and, like General Washington before them, will turn the reigns of power over to civs ASAP.
About to and actually doing are two different things. Look how far things had already gone in Germany and the rest of the world. Too many didn't speak up in time then and too many aren't speaking up today.