Henry Wallace was the vice president for FDR until just a few months before FDR died. He's somewhat controversial for how pro-Soviet he was, and he was kind of a weirdo. However with the benefit of hindsight, I'm interested to know what kind of president he would've been, would he really have been a disaster or would he have been great? Or somewhere between the two? It would certainly be interesting to know how he'd handle things in Truman's place. Of course, I don't have any illusions he'd win election in his own right barring a miracle, so who the Democrats would pick instead would be interesting.