People wait in line at a Soriana supermarket in Mexico City, Tuesday July 3, 2012. Many of the people at the supermarket say they went to redeem pre-paid gift cards they said were given them by the party that won Mexico's presidency and at least a few cardholders were angry, complaining they didn't get as much as promised, or that their cards weren't working. The incidents are inflaming accusations that the election was marred by massive vote-buying. (AP Photo/Marco Ugarte)