Senate Stuck on Quarrels Over ImmigrationBy DAVID ESPO, AP Special Correspondent 25 minutes ago Los Angeles Mayor Antonio Villaraigosa and Dolores Huerta, co-founder of the United Farm Workers, pray in Los Angeles Wednesday, April 5, 2006, with Cardinal Roger Mahony, who was delivering a special Mass at Cathedral of Our Lady of the Angels to offer prayers for legislators who are debating immigration legislation this week. (AP Photo/Ricardo DeAratanha/Pool) WASHINGTON - The Senate swung between compromise and gridlock Wednesday on the most sweeping immigration bill in two decades, the future of an estimated 11 million illegal aliens at the mercy...