Ack! Many Times!
I read this a long time ago and misread it. Not sure how it happened, but I remember reading that FDR was the most liberal, not the most conservative, of all Democratic Party candidates since his day. In at least a dozen places I'd said that FDR and Reagan were both the most extreme candidates, and therefore, even if you believed Obama was an ultra-liberal, maybe that wasn't so bad. Reagan was the most conservative President since FDR. Obama's short record in the U.S. Senate puts him to the right of FDR. Still, there is a very large gap between FDR and Eisenhower. There has not been a centrist U.S. President since (at the very least) FDR.