MONTERREY, MEXICO — Congress' new immigration plan was bad news for tens of thousands of poor Mexicans who depend on a U.S. guestworker program for temporary jobs in agriculture and other seasonal work, such as landscaping and construction. Millions of would-be migrants have been holding tight to President Bush's promise that they could one day apply for temporary visas to get a glimpse of the American dream. At the U.S. Consulate in Monterrey, which hands out more temporary visas than any other consulate or embassy in the world, Edmundo Bermudez, a 36-year-old from the northern city of Durango, said the...