I'm one of the targets of this and I have been surrounded by strange events today. Like people are getting nervous or something.  That in itself can make you immediately think along those lines. Because I fear for POTUS safety in what is to come, my initial take was that Esper was not going to allow Mil to support POTUS if the WH was overrun. He was the block the DS had to keep Mil from rescuing POTUS from any harm his USSS and Fed agents couldn't handle.