http://www.salon.com/politics/war_room/2007/12/21/gore_obama/print.html

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Tim Grieve
Dec. 21, 2007 | At a campaign stop in New Hampshire Thursday night, a guy in a Santa hat asked Barack Obama about global warming. The candidate's is-that-idle-talk-or-a-hint-about-an-endorsement response: "I talk to Al Gore about every three weeks, and we're going to make sure that your home at the North Pole is still available to you."
-- Tim Grieve