The most enduring benefit of Friday’s special legislative session could be that it focused lawmakers’ attention on providing more certainty in business regulations. Just last month, some legislative candidates were being derided in campaign advertising as tools of corporate interests. Yet last week, many legislators — at Gov. John Kitzhaber’s behest — were falling all over themselves to serve the tax interests of one of Oregon’s most powerful corporations, Nike. It was the right move. Not because of Nike’s political power, but because of Nike’s economic power. Legislators gave the governor the authority to guarantee corporations that their state income …