LA Times: Reporting from San Francisco — For all his green talk en route to the White House, President Barack Obama remains a cipher on one of the most critical environmental and economic issues facing California: whether to expand drilling for oil and gas off the coast for the first time in a generation. In four crowded meetings from Atlantic City to Anchorage, the administration has elicited heated comment from all sides on the future of the outer continental shelf, wrapping up a two-week …