His central argument was not that the system isn't broken. That is only a step in the causal chain of his argument which leads to his conclusion: that Obama is a weak leader. In making that argument, he is comparing Obama unfavorably to both Reagan and Clinton. This historical comparison is a necessary component of his argument. He's saying, look, Obama can't be excused because of a supposedly broken system, because these other guys got things done under the same system. Hence, his analogy to these past Presidents must be a strong one, in terms of particular similarities in circumstances, for his argument to have merit. But it isn't a strong one because it ignores too much context. If you're going to make arguments based on historical comparisons, more content, and context, are required. Anyone can find a bi-partisan achievement in the record of a 2 term President, somewhere. Pulling de-contextualized facts out of the historical ether does not make for a sound comparative argument.
I agree that he included Clinton to give his piece a "bi-partisan" feel, though I note he used a "conservative" achievement of Clinton's - welfare reform - to make his point. He didn't mention LBJ, which is the most common comparison made when people are critiquing Obama - because that would mean that he at least tacitly admits that Medicare and Medicaid were bi-partisan "achievements." Clever, that Charlie.
I tend to agree with the balance of your comments, though I think you are somewhat moderating Krauthammer's points. If Krauthammer wanted to say what you just said, he would have done so. He could have pointed out that the examples he used as comparisons went through awkward periods early in their presidencies, but improved later on, and that this could happen with Obama. Instead, he was content to leave the reader with the impression that Obama is just a weak leader, and that's that.
- wolf