Trump is not controlled by the swamp. This is why they have all united to undermine Trump and his presidency.
I can think of no other reasonable explanation. Trump poses a clear and present danger to their plans. In fact, it's quite possible the elder Bush was forced on Reagan as a trojan horse that would later undo whatever Reagan was able to accomplish. If so, it worked to perfection.
There is every possibility that Pence is Trump’s Bush.