Atlantic magazine's Jonathan Chait recently experienced a brief flirtation with political sanity when he expressed panic over the possibility of communists (who now call themselves socialists) taking over his beloved Democrat Party.However, alas, poor Chait relapsed and embraced one of the most fervent Mad Hatter delusions of the extreme left, as you can see in the very title of his Wednesday descent down the Socialist (Communist) rabbit hole: "Abolishing the Senate Might Be the DSA’s Best Idea."The subtitle assures no return trip for Chait, who just flushed away the concept of American federalism: "A teardown of the upper chamber would...