@Nonilex it should have been. But a simple answer is Trump systematically purging his team of competency over loyalty. He wants 2 things most, adoration and yes men. That is incompatable with the responsibilities of a protective detail.
Now, the gop guy that has no signs of radicalization, trail of media or other communications really flags as either a one off lone wolf or someone groomed outside those ttacking mechanisms possible with the lure of making Trump look like a hero under threat. The patsy expecting to be arrested, not killed, and feted by his right wing heros. Thats a lot of conjecture on my part but its impossible to be to far off a ledge when it comes to Stone, Flynn, Trump and Putin.