Oil traders scrambling to secure crude in the U.S. Midwest have pushed North Dakota’s Bakken to a near premium for the first time in two years, a rally stoked by record refinery runs and an unprecedented slump in Canadian imports. The buying frenzy pushed Bakken delivered at Clearbrook, Minnesota (WTC-BAK), to trade just 35 cents a barrel below the West Texas Intermediate benchmark last week, dealers say, the narrowest discount since July 2013. There are other compelling reasons for Bakken crude’s relative strength, to be sure.