Long considered an ally of Delta advocates, U.S. Rep. John Garamendi introduced legislation this week that appears likely to test that reputation.Garamendi, a Democrat who lives in Walnut Grove and represents the north Delta, sent to the House of Representatives a drought bill that he said is identical to legislation already brought to the Senate by fellow Democrat Dianne Feinstein.The lengthy Feinstein bill contains $1.3 billion worth of long-term solutions for future water shortages, including dams, desalination and water recycling projects.