WASHINGTON -- House Republicans and the Obama administration are at odds over a GOP bill aimed at boosting a proposed Arizona copper mine that would be the largest in North America. GOP lawmakers and business groups, including the U.S. Chamber of Commerce and the National Mining Association, say the project would pump billions of dollars into the Arizona economy and help create nearly 4,000 mining-related jobs. [snip] Under the plan, first proposed in 2005, about 5,300 acres of environmentally sensitive land throughout Arizona would be transferred to federal control, including 3,000 acres on the lower San Pedro River in southeastern...