For close to a decade now, Democrats have been arguing with each other about what kind of country this is, and what kind of party they should be. On one side stands a group of politicians, consultants and wonks who believe that America is, at its core, a pretty conservative place. These Democrats form something of a political generation. In their youth, they saw their party move left during Vietnam and get booted from power in 1968. Then they saw George McGovern, the most left-wing major party presidential candidate of the twentieth century, lose 49 states. Then they saw Jimmy Carter’s presidency destroyed in part because he looked weak during the Iran hostage crisis. Then they saw Ronald Reagan, once considered as an unelectable right-wing nut, become the most popular president of their adult lives.