American politics is ugly these days, and many people wish things were different. For example, Barack Obama recently lamented the fact that “politics has become so bitter and partisan” — which it certainly has.

But he then went on to say that partisanship is why “we can’t tackle the big problems that demand solutions. And that’s what we have to change first.” Um, no. If history is any guide, what we need are political leaders willing to tackle the big problems despite bitter partisan opposition. If all goes well, we’ll eventually have a new era of bipartisanship — but that will be the end of the story, not the beginning.

Or to put it another way: what we need now is another F.D.R., not another Dwight Eisenhower.