And the controversial Keystone XL pipeline, whose construction has been delayed over environmental concerns, could now face some competition.
As NPR's John Ydstie reports, two companies have announced plans to build pipelines that would carry out the same service as the XL, channeling oil from Canada's tar sands to refineries in the Gulf of Mexico.
Mitt Romney has an impressive victory in Illinois, gets Jeb Bush's backing, revives the inevitability argument and then gets bogged down in an Etch A Sketch distraction. Plus: Illinois primary results, and Barbara Mikulski breaks a record. NPR's Ken Rudin and Ron Elving have this week's political roundup.