VP Harris primary support is from women that want the federal government to force abortion on all of the states Women for Harris don’t want states to have the freedom to choose what they want for-themselves.
In some instances like slavery federal rules, so long as they are morally sound positions, should prevail. On most other moral issues states and the citizens thereof ought to decide for themselves how they want to live and regulate themselves.
Select environmental concerns are compelling and require federal oversight when people lack knowledge of emergent issues of a complex nature. The nation however can survive and thrive if Californians and Bostonians have abortions and those from Idaho and Texas don’t. Federal law for abortion is not critical; a dictatorship of federal Democrats is not even desirable.