MILWAUKEE (AP) – U.S. senators from Great Lakes states are urging quick action to stop the movement of Asian carp. All 16 senators from Great Lakes states sent a letter Wednesday to the U.S. Army Corps of Engineers. The senators want fast action to stop the invasive fish from swimming up the Chicago Sanitary and Ship Canal into the lakes.¬† The Milwaukee Journal Sentinel¬†reports the letter was sent one day after news broke that Asian carp DNA had been detected for the first time in Lake Michigan waters off Wisconsin. Under orders from Congress, the Army Corps has been studying the problem of invasive carp making their way to the world’s largest freshwater system for several years. The Corps is scheduled to release a plan to block the fish in January.