I don't quite understand the new age trend or fixation to validate the spawned political mood thats led a witch hunt on a time machine to try and bend the legacies of former and dead presidents as a communist, but to each there own. Regardless of what you make of FDR greatness you can at least credit him for perhaps one of the most pivotal actions for twentieth century America that changed the stage entirely in ways that would have most likely not materialized had he not signed off for an advisory committee on uraneum after the Einstein Szilliard letter. While his response wasn't necessarily enthusiastic and even slow initially, it was the first step by our government that led towards the early development of the bomb. How anyone else might had responded is speculative. I don't see why his legacy, though bloated, would in any way justify him befitting as the worst in history.