FILE - In this March 22, 2012 file photo, Sen John Cornyn, R-Texas points to his lapel pin as he speaks about the Keystone XL pipeline during a news conference on Capitol Hill in Washington. President... more 
FILE - In this March 22, 2012 file photo, Sen John Cornyn, R-Texas points to his lapel pin as he speaks about the Keystone XL pipeline during a news conference on Capitol Hill in Washington. President Barack Obama says that the proposed Keystone XL pipeline project from Canada to Texas should only be approved if it doesn't worsen carbon pollution. Obama says allowing the oil pipeline to be built requires a finding that doing so is in the nation's interest. He says that means determining that the pipeline does not contribute and "significantly exacerbate" emissions. (AP Photo/Charles Dharapak, File) less 
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Associated Press | Photo By Charles Dharapak, File
Tue, Jun 25, 2013 2:50 PM EDT