a fun thing about conservative SCOTUS deference to state legislatures is these are the same justices that have permitted the kind of hyper-partisan gerrymandering that has allowed wisconsin republicans, for example, to lose the statewide vote but win a supermajority of seats.

"oh you want authorities to count all the votes? well, win a majority and change the law. oh, we've allowed our fellow travelers to turn voting minorities into unbreakable legislative majorities? weird how that happened"

and of course, as we've seen in wisconsin and michigan and north carolina, if you manage to elect a governor as a counterweight to the gerrymandered minority legislature, that legislature will just strip the governor of power

muster a supermajority of your fellow citizens to amend your state constitution to expand the franchise? well, as we've seen in florida, the republican governor and legislature will just invalidate it with a poll tax.