president obama's pick to head commerce department has a tough road ahead. republicans are promising to block the nomination of john bryceson. correspondent doug mckelway tells us why. >> today i am pleased to announce i will nominate john bryson to be the nation's next commerce secretary. >> reporter: the commerce secretary nominee bryson most noted for cofounding the natural resources defense council, 1.3 million member nationwide. he's also champion of cap-and-trade policies to reduce carbon emissions. >> it has the advantage politically of hiding the tax, to try to raise the price of carbon. >> reporter: conservative critics say the policy that hi h favors would cause economic hardship. >> they're trying to raise energy prices and lower income families pay higher percent of