No, because all military, FBI, and Secret Service swear to defend the Constitution. That is their primary loyalty and they have very little support for the idea of a dictatorship. Congress has to impeach him or remove him, and then essentially everyone in all such services will see Pence as President.
Trump made a huge mistake in firing Comey. He was well liked and most FBI agents are more loyal to him than to Trump. FBI agents are highly educated and highly professional. They know Trump is a moron unworthy of their respect. If they had a legal reason to put him on the helicopter to San Clemente, they would.
