As we slog through another depressing period of obstruction and shutdown threats in Congress, it might be worth looking backward to another moment that felt impossibly polarized: Autumn 2013, when Sen. Patty Murray and Rep. Paul Ryan produced a budget agreement that many observers considered unattainable. To be sure, the agreement they reached was modest. Though it prevented a series of brutal cuts and kept the government operating without the constant threat of new deadline showdowns, it was unsatisfying to the most vocal and passionate voices on the right and the left. But in these days of extremity and bad faith, we seem to have forgotten that this is what political compromise is: less than all you want, in exchange for something you can tolerate if you must.