NEW ORLEANS (AP) — A federal magistrate refused Wednesday to order the White House to provide BP PLC with emails by a former top adviser to President Barack Obama about the administration's response to last summer's massive Gulf oil spill. A lawyer for the oil giant had argued that emails by Carol Browner, Obama's former adviser on energy and climate matters, and three other officials in the Executive Office of the President could shed light on the White House's role in estimating the rate of oil gushing into the Gulf of Mexico from the company's blown-out well. But U.S. Magistrate...