Mystery Mitt II

Why would Mitt Romney -- who won the Michigan primary by promising never to let jobs leave Detroit, and will presumably do this again in 2012 -- think it's a good idea to write an NYT op-ed titled "Let Detroit Go Bankrupt"? I'm sure there was some manner of political calculation behind it, but the difficulty with a tone-deaf politician like Romney is that it's sometimes hard to tell precisely what he thinks he's doing. Has he realized that there's no point to his running for president again? (I wonder if he can afford to.)