MUI it is based on the 10A. The States can manage their jurisdiction any way they want, including deference to cities and counties.
Just MU — YMMV.
Oh I see
So if the local town or state wants to institute slavery they can
If they want to ban all guns, no problem
Ban all abortions
Require all journalists to get town/state approval for all columns, articles, any that are critical of the dear leaders no problem at all
Require white only/black only drinking fountains, bathrooms, diners, schools etc no issue at all
Just as long as the federal government doesn’t do it