Reuters: President Barack Obama's recent comments on the Keystone XL oil pipeline, downplaying jobs that would be created, jeopardize the project by adding to its uncertainty, Republican lawmakers said in a letter to the president on Wednesday. "We are concerned that your recent statements have signaled an arbitrary and abrupt shift in how our nation approves cross-border energy projects," Republican Representatives Fred Upton, Ed Whitfield, and Lee Terry said in a letter. Obama has said twice over the...