They don’t have a 60 vote majority in the Senate, and legalizing abortion isn’t likely something they can pass through reconciliation.

They also can’t end the filibuster without Joe Manchin.

The Senate is split 50/50 so the have the slimmest possible majority, and abortion is a hill nearly all Republicans are willing to die on.

I’m not sure this has anything to do with the current distinction unless by the current distinction you mean the nearly equal split.