Why are the Leftists & Establishment Republicans so Afraid to Let Abortion Be Decided by Voters in Each State?

Translate:

If abortion is as popular as the leftists (and establishment Republicans) say that it is, then why are they so fearful of allowing the voters in each state to decide the issue by overturn of Roe v. Wade, shouldn’t the Democrats and pro-abort Republicans be confident they would win in most if not all of the states?