Keystone XL Pipeline
Initially Trump said he would approve the Keystone XL pipeline "immediately". His new position is that he would reject the pipeline unless TransCanada Corp. gave the U.S. a “big, big chunk of the profits, or even ownership rights.”
For a long time Clinton’s campaign said she has no position, often hedging on the question. Her position now is "I don't think we need to have a pipeline bringing very dirty oil, exploiting the tar sands in western Canada, across our border.