President Obama's two-day, four-state energy tour came to an end yesterday afternoon at Ohio State University, where he again declared his commitment to domestic oil and gas drilling, called for continued development of clean and alternative energy and hammered home many of his favorite energy statistics and political one-liners of the past 48 hours. The speech before a rowdy, mostly student crowd of 2,600 was something of a closing argument in the energy case he sought to build during his tour, which also took him to Nevada, New Mexico and Oklahoma.