I think the key is to ask yourself what did you get for the money spent. Lincoln had to fight a Civil War that he did not start. FDR and Wilson got dragged into World Wars. Obama had to deal with a recession. One that he has made little progress in resolving. Obama's challenge is nowhere near that of those in front of him on the list. Add that to the fact that he has accomplished so very little in his administration, and it is a valid question to ask if Obama is the worst president. The presidents before and after Lincoln were worse than Obama. Obama might be the worst president of the last century, though. GWB is close, of course. LBJ is not far behind, along with Carter.