WASHINGTON – New York Mayor Michael Bloomberg backed President Barack Obama over Republican Mitt Romney on Thursday, saying the incumbent Democrat will bring critically needed leadership to fight climate change after the East Coast devastation wrought by Hurricane Sandy.

The endorsement from the politically independent and nationally recognizable mayor was a major boost for Obama, who is spending the campaign's final days trying to win over independent voters whose voices will be critical in determining the winner of Tuesday's election.

Both candidates had eagerly sought the nod from Bloomberg, who didn't endorse a presidential candidate in 2008 and has publicly grumbled about both Obama and Romney. But Bloomberg said the possibility that Sandy resulted from climate change had made the stakes of the election that much clearer.