US Republican presidential candidate Rick Santorum has been caught in a potentially embarrassing verbal slip-up.
In a clip uploaded on Thursday and reported to show Santorum speaking in Wisconsin on 27 March, he stumbles over a word beginning with 'N'.
"We know the candidate Barack Obama what he was like, the anti-war government n.." he says, before stopping himself. He adds "America was a source of division around the world."
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It's not clear what Santorum was about to say. We will let you decide.