Procedural snares and ``killer'' amendments threaten to disrupt the fragile coalition in the Senate that's holding together the most sweeping overhaul of U.S. immigration policy since 1986. Supporters are scrambling to address the legislative obstacles before debate resumes next week. Opponents plan to try to derail the legislation by using procedural delays and offering poison-pill amendments that may split the coalition that sustains the measure. Passage of the legislation would give 12 million undocumented immigrants a chance at legal status while handing President George W. Bush a victory on his top domestic priority. ``This is a delicate balance. The wheels...
