I might be having some second thoughts about the downgrade - both the fiscal and political arguments. Politically, I think I was too blase about what this debt limit fight signified. The truth is that it is more likely that future Congresses are more likely to threaten default for political purposes (I do hate all the stupid and over-heated rhetoric like terrorists and hostage-takers, etc). And maybe it is responsible for S&P to make it clear that showing a willingness to risk default will lead to downgrades. Not a bad lesson for everyone to learn.
As for the fiscal reasons, I am now undecided. Felix Salmon argues that the fiscal argument should be ignored; the downgrade was the right decision and the fiscal argument is just there to provide some cover for what is inherently a political statement.
I disagree; I think since they made the fiscal argument, we need to analyze it. And on the fiscal argument, I am now torn. I don't agree that we have a short- or medium-term problem. And saying so only allows Republicans to point to that to suggest they were right to be so obstinate and dangerous with the debt ceiling in order to get deeper cuts.
However, if we avoid terms like medium-term and long-term, and try to simplify it further, I might agree with their point. I might agree if they are saying: that current budget deficits are not a problem, but future projected deficits are; that the recent budget deal shows that we are not serious about our long-term problems because it only cut discretionary spending, which can be easily reversed in the future, when the real problem is with entitlements and revenue.
But even if that is what they are saying, does that mean we need a downgrade now? If the problem is down the road but we aren't willing to deal with it now, is that worrisome enough for a downgrade? That I still don't know. I agree that we have problems down the road. And I agree that we should be able to deal with that right now but we aren't. But since it is so far down the road, I question whether it really means we need a downgrade now.
Anyway, to conclude, I think the recent developments - a willingness by some to default on our debt and an inability to actually deal with long term problems - are troubling. But I am still trying to decide if the later issue - inability to deal with problems down the road - is urgent enough to support a downgrade.
Also, while I am still trying to decide if I agree with the decision, I don't actually have a plausible reason for why S&P did it, except that they believe it. They don't have a lot of credibility in my book. However, I have to admit that their mistakes in the past seemed to be related to a conflict of interest, which doesn't seem to exist here. There doesn't seem to be a lot of upside for making a bad decision. So the only reason I can see is lack of judgment - which I certainly won't rule out.