Associated Press: Democrats are grappling with an election-year dilemma posed by the Keystone XL oil pipeline.
Wealthy party donors are funding candidates who oppose the project - a high-profile symbol of the political debate over climate change. But some of the party's most vulnerable incumbents are pipeline boosters, and whether Democrats retain control of the Senate after the 2014 midterm elections may hinge on them.
The dilemma was highlighted Thursday as President Barack Obama's former national security...