Mexico entered a brave old world on Sunday by electing former Mexico City Mayor Andrés Manuel López Obrador to a six-year term as president. The 64-year-old left-wing populist has lost twice, in 2006 and 2012, but this time he won against two weak candidates while promising more moderate policies.
The official vote count wasn’t available late Sunday evening, but exit polls gave Mr. López Obrador a large enough margin to call him the winner. Ricardo Anaya of the National Action Party (PAN) is expected to finish a distant second...