Past performance is no guarantee of future returns but there are few more reliable ways to predict what comes next than to examine the historical record because, most of the time, history really does repeat. What kind of president would Joe Biden be? His centrist supporters assure progressives that he will be one of them, pushing an aggressive legislative agenda reminiscent of FDR’s New Deal. His Republican opponents portray him as a socialist. But Biden hasn’t actually promised anything ambitious. The last two Democratic presidencies provide a good indication of what a Biden Administration would look like. Like Biden, Bill Clinton and Barack Obama hail from the centrist party establishment. If personnel is policy, the three men hang out with many of the same advisors, businesspeople and elected officials. They’re not identical: Clinton is a charismatic retail politician, Obama is aloof and professorial, and Biden is an LBJ-style buttonholer minus Johnson’s secret idealism. But they’re ideologically and temperamentally similar to…