Reuters: BP massive oil spill has given Gulf Coast lawmakers leverage to push for a larger share of the billions of dollars in royalties that oil companies pay to drill in U.S. waters. As a part of 2006 energy legislation, lawmakers like Louisiana Senator Mary Landrieu secured a deal to direct a 37.5 percent share of U.S. offshore royalties to coastal states starting in 2017. The provision would net $650 million a year to Louisiana alone, with smaller amounts flowing to Alabama and …