I agree with the OP. What is the purpose of having a POTUS if he is helpless in protecting the people of states who are at the mercy of a really BAD and corrupt governor? Not ALL voted for that person. Why doesn't each state then have their own potos (president of their own state) then?
That, for all intents and purposes, is what a Governor is in this country—the President of a state. As originally set up under the Constitution, the states are supposed to be semi-sovereign mini-countries, with the federal government having only very limited authority. Most of the mundane crime, including rioting, falls solidly under the jurisdiction of the state in which it occurs,and not under the jurisdiction of the federal government.
So the answer to why the President isn't doing much about the riots is that it's not his job, and he has neither the duty nor the authority to do much of anything about intra-state crimes. That's up to the Governor of each state in which rioting happens,and up to the system of laws and justice set up in each state.
I didn't realize they had THAT much power over their whole state. Now I do. It sucks.
Do they not teach this in schools any more? I am amazed at how unimaginably ignorant so many of my fellow Americans are, about the basic structure and operation of our various levels of government. I'm pretty sure that I understood the basics, by the time I finished elementary school.