I will agree that Obama is enough of a maniac that he seems, out of the last several Presidents, the most likely to do something like that; but any President that declares martial law and suspends the electoral process--for whatever reason--had better be ready to rule with an iron fist, because the backlash would be massive. It would mean complete civil war with no city spared, including Washington, D.C., and the armed forces would be too fragmented to do anything about it.
Obama is doing what he can to try to take Trump down a peg, so that Hillary will win the election instead of Trump. The inflammatory language is part and parcel of the process. Democrats have been claiming that Republican candidates are unfit for office for decades. Of course Obama's going to say now that neither McCain or Romney would be out of their depth in office, since neither of them is, but I'd bet money that's not what he would have said about either of them if they were running now instead of Trump. Democrats always insist that Republicans are never fit to hold office; that's nothing new or even remarkable.
So, yeah, not betting on it. As much of a skunk as Obama is, I don't see him having the spine.
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Gee, if only there were some record of how previous attempts like this had fared. Short form: rich idiot thinks he's smart enough to make communism work when it has failed every time it's been tried.
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Still burning food instead of gasoline. Still stupid.
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Anyway, I'm going to make some dinner, I think.