An environmental activist is claiming that Vice President Joe Biden personally told her he is “in the minority” inside the White House in opposing approval of the Keystone XL oil pipeline. Elaine Cooper says she spoke to Biden at a public event in South Carolina last week. Writing for the Sierra Club, Cooper said: “I asked him about the administration’s commitment to making progress on climate and whether the president would reject the pipeline. He looked at the Sierra Club hat on my head, and he said, 'Yes, I do — I share your views — but I am in the minority.'” The news led a coalition of environmental groups to take out an ad reading: “Tell President Obama and Secretary Kerry: Joe Biden is Right.” An anonymous official in Biden’s office refused to comment directly on the reported exchange but said Biden’s official position on the pipeline remains to await the final results of a State Department review.