WASHINGTON (BP)--An Oklahoma congressman introduced a bill July 22 that goes a step beyond current law by banning same-sex "marriage" nationwide -- including in Massachusetts -- and unlike a constitutional amendment, requires only a simple majority to pass. Called the National Marriage Law, the bill, if passed, would supercede state laws, thereby voiding Massachusetts' law legalizing same-sex "marriage." In addition, the law would prevent state courts or lower federal courts from hearing challenges to it. Only the Supreme Court would be able to review it. Sponsored by Rep. Ernest Istook, R.-Okla., the bill has 37 co-sponsors. "This is the only...