STOCKTON - During the first congressional hearing into what might be causing the ecosystem crisis in the Delta, Rep. George Miller said Monday that water agency officials are committed to sending water to San Joaquin Valley and Southern California even it comes at the expense of the Delta's health. Miller, D-Martinez, said he doubts whether advice coming from scientists will be heeded if they conclude that pumping water out of the Delta is the main cause of the declining ecosystem.Water pumping is considered one of the three leading suspects causing the Delta's problems, along with invasive species, especially an Asian...