FILE - In this Feb. 17, 2013, file photo, Native Americans match with other protestors from the National Mall to the White House in Washington during a rally calling on President Barack Obama to reject the Keystone XL oil pipeline from Canada. Obama is running out of reasons to say no to Keystone XL, the proposed oil pipeline that’s long been looming over his environmental legacy. Five years after the pipeline’s backers first asked the Obama administration for approval, the project remains in limbo. It’s stuck in a complex permitting process that has enabled Obama to put off what will inevitably be a politically explosive decision. (AP Photo/Manuel Balce Ceneta, File)
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