Huffington Post: TransCanada, the company seeking to build the controversial pipeline that would carry oil from Alberta to refineries in Texas, is leaning on Secretary of State John Kerry to make a permitting decision. In letter to Kerry and other State Department officials, TransCanada's executive vice president and general counsel Kristine Delkus argues that because Canada has announced various steps to curb its overall greenhouse gas emissions, the United States should allow the Keystone XL pipeline to go forward....