Portland Business Journal: Nike Inc. has joined with several retail heavyweights, including Starbucks Corp. and Levi Strauss & Co. to make an aggressive push for federal action on climate change. Last fall, the Washington County-based sportswear giant formed the group Business for Innovative Climate & Energy Policy — or BICEP — to advocate for a national cap-and-trade system for carbon emissions. Such a system would set a limit on greenhouse gas emissions. Companies that exceeded the limit …