POINTE A LA HACHE, La. (AP) — Plaquemines Parish sheriff’s deputies are searching for a 70-year-old fisherman who was knocked overboard from his small boat as Tropical Storm Ida approached Monday.Authorities say Leo Ancalade is presumed dead.The Coast Guard says Ancalade was towing friends whose small boat lost power in the Mississippi River near Fort Jackson. The commander of the sheriff’s office marine division, Capt. Robert Cosse, says a wave overturned his boat.Ancalade’s friends, Gerald and O.V. St. Ann, dove into the river in a failed rescue attempt.