Bloomberg: President Barack Obama is being pressed by opponents of the Keystone XL pipeline to tie any approval to measures that would curb climate change, reflecting mounting pressure on the administration to mitigate the projects impact if it goes forward.
Senator Sheldon Whitehouse, a Rhode Island Democrat, is among those who want to see new steps to limit greenhouse-gas emissions in the U.S. if TransCanada Corp. (TRP)s petition to build the $5.3 billion pipeline to carry tar-sands oil from Canada to...