Krauze on Election Day

He has a piece in today's NY Times. He (and the headline) suggests that the most significant storyline was the loss of the incumbent party in six of 12 elections, which I think he probably overstates. Other than that, my only other reaction is that it's odd that the NY Times style dictates that the Mexican parties are written "PRI", "PAN", and then "P.R.D."; why the difference for the lefties?