MEXICO CITY - (KRT) - The day after the U.S. presidential election, Jim and Joan Marker left for a scheduled vacation in San Miguel de Allende, central Mexico. Now they've decided they'd like to live there permanently. The Alabama couple are among the many United States citizens who have been going south, for adventure or a new life. The decades-long trend has gathered steam in recent years, statistics show, and Mexico is undergoing a sustained Americanization, with Americans buying more property, seeking permanent residency and congregating in enclaves that seem like home abroad. The U.S. State Department estimates that the...