WASHINGTON-Republican leadership aides are accusing the Democrats of using a double standard by imposing the higher minimum wage on the Northern Mariana Islands-considered a Republican protectorate-while continuing to exempt a Democratic territory, American Samoa. Under a Democrat-backed legislation that is now before the House of Representatives, employers on the Northern Mariana Islands would have to pay workers the federal minimum wage. American Samoa and the tuna industry that dominates its economy would, on the other hand, remain free to pay wages less than half the bill's new mandatory minimum. Democrats have long tried to pull the Northern Marianas under the...