Two of the court's conservative justices—Clarence Thomas and Samuel Alito—are in their seventies, while Sonia Sotomayor, a liberal, will turn 70 next month.
So we need to replace Thomas and Alito with progressive justices and either keep Sotomayor or replace her with a progressive justice as well to get to 5 non-conservative justices.
That's a big IF. 4 years for 4 SCOTUS justices to retire? And the conservatives know this? I bet Alito and Thomas won't retire just to fuck the country up longer. Especially Thomas. He hates this country and every non-rich person in it.