The Keystone XL Pipeline Divides the Democrats

After more than five years of passionate debate. last week the Obama Administration announced another delay in the Keystone XL Pipeline, designed to bring oil from Canadian tar sands across the border and on to refineries on the Gulf Coast. Republicans call it "shameful" to put off increasing oil supplies from a friendly neighbor. But Democrats are sharply divided, caught between oil interests, organized labor and environmentalists, who praise the delay in the interests of climate change and potential health affects. What's the role of this year's midterm elections and control of the Senate? What do cowboys and Indians have to do with it?