"Imagine you have just been elected president. You are now commander-in-chief, chief executive, chief diplomat, chief legislator, chief of party, chief voice of the people, first responder, chief priest, and world leader. You're expected to fulfill your campaign promises, but you're also expected to solve the urgent crises of the day. What's on your to-do list? Where would you even start? The American presidency is in trouble. It has become overburdened,...