"As President Donald Trump and Senate Majority Leader Mitch McConnell move to confirm Amy Coney Barrett on the Supreme Court, progressive Democrats are increasingly talking about packing the Supreme Court in retaliation — increasing the size of the court and adding new, liberal justices to the bench," writes Noah Feldman. "At a minimum, the idea rests on the heroic assumption that Democrats will win the presidency and both houses of Congress. But that’s not all. History demonstrates the grave difficulty of successfully mustering even majority-party support to add new Supreme Court seats."