... KXL’s Alberta-to-Nebraska northern leg (shortcutting other sections already built or being built) was meant to give Canadian tar sands, lately rebranded “oil sands,” a cheaper, simpler, and safer route to market than railcars. But which market? That depends on whom you ask. Promoters say American consumers, and refer only to crude oil. Opponents worry mainly about refined products, which Gulf Coast refineries sell wherever they’ll fetch the best price net of delivery costs. Thus if KXL’s oil cut domestic products much below the world price, they’d be exported instead. ...