A comic-book character popular in Mexico for generations has run into a cultural barrier at the border, where Americans see him as a racist caricature. For more than 60 years Mexicans have followed the adventures of "Memin Pinguin." But the dark-skinned Memin's exaggerated features in "Memin for President" came as a shock to Houston, Texas, Wal-Mart shopper Shawnedria McGinty. "I was like, OK, is that a monkey or a boy?" McGinty said. "To me it was an insult." She'd never heard of "Memin Pinguin." She bought a Spanish-English dictionary and tried translating but still didn't like what she saw. "So...