I think you need a class on US Civics my man. There are checks and balances. If the legislative and judicial branches of government (which are overwhelmingly white) say no then nothing happens unless the POTUS is sending troops somewhere.
There is still the power of the Executive Order and the Veto. The POTUS just needs an overwhelmingly good reason to use
those powers ... especially if the POTUS is Black. I now believe that if this saviour that you are waiting for arrives you wouldn't
recognise him/her, nor would you know how to take advantage.