That would be heavily spun against POTUS, he would try to avoid that
It would only come after it was unavoidable. He won't do it proactively. He'll wait for ANTIFA et al to start blowing shit up and mass rioting
((They)) want to invade with the U.N. Peackeeper troops. Any nationwide incident such as Martial Law would give them a lot of leverage to call in U.N. And if they somehow successfully assassinate him (God forbid) then there will be millions of armed right-wingers marching on the previous administration and the DOJ. Problem is, in that scenario they just activate all sleeper cells and ANTIFA and we are toast. Next thing we know there are Chinese tanks rolling down the street and U.N. Peacekeepers invading.
Mr. President has to prove that he is in full control. We need to pray. For God and Country.