While on the subject of states rights.
A lot of us in the south remember being told by the feds that school busing was required to maintain racial balance. Most school systems did it ( and a lot of people moved their kids to private schools and to areas where there were no blacks). I just don't remember the violence at the level of when the courts told the Boston and other northern areas to bus the students.
I remember people firebombing buses, schools etc. This was way late in the game. This was in the color tv days, not the black and white days of the south.
I remember that when the federal courts ruled about the Boston and other schools has to do it that they were pissed that it applied to them and not the southern white trash. The leaders up north screamed "states rights" and "It doesn't apply to us".
Here is something about the Boston. https://en.wikipedia.org/wiki/Boston_desegregation_busing_crisis
But I seem to remember it being New York, Penn, Conn, Delaware just about all the original colonies.
It hasn't gone away, because we keep electing those same leaders.
On edit: The people in the south remember how we were treated differently than the people in the north. When the party gets rid of that older generation and bring in the younger ones who lived though and adjusted to the new society, then the south will elect Democratic Party candidates every where. Right now, no one remembers the way it was, but it is in the back of our old minds.