Robert F. Kennedy Jr. and Greg Palast have a great article on voter suppression tactics at Rolling Stone:
These days, the old west rail hub of Las Vegas, New Mexico, is little more than a dusty economic dead zone amid a boneyard of bare mesas. In national elections, the town overwhelmingly votes Democratic: More than 80 percent of all residents are Hispanic, and one in four lives below the poverty line. On February 5th, the day of the Super Tuesday caucus, a school-bus driver named Paul Maez arrived at his local polling station to cast his ballot. To his surprise, Maez found that his name had vanished from the list of registered voters, thanks to a statewide effort to deter fraudulent voting. For Maez, the shock was especially acute: He is the supervisor of elections in Las Vegas.