Eugene Robinson writes in the Washington Post, here. The thrust of Robinson's argument is that the S&P downgrade of US debt is due to Republican's threatening to not extend the debt limit. My belief is that Robinson is using a tried and true political practice to sway the opinions of people who don't take much care in forming those opinions. What is the tactic? Robinson claims that a reasonable position is absurd, then argues in favor of the stupid position.
To see what I'm talking about, look here.