Herman Cain says the Democrats he has supported in the past were “all moderate Democrats.” I was surprised to find my congressman, Rep. Jose Serrano, on that list. Is he a “moderate Democrat”? Let’s ask National Journal: Serrano has one of the most liberal voting records in the House. Egad. That does not sound like “moderate Democrat” to me. But let’s look at the details: In opposition to Cuban Hispanics in Congress, Serrano has been Fidel Castro’s greatest champion in the House. He has sought repeal of economic sanctions against Cuba. When questions arose about Castro’s future after major surgery...