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Republican presidential hopefuls in the US have just over a week to impress voters in Iowa.

It will be the first state to vote for a potential candidate who will be up against Barack Obama in next year's election.

But the chase to the White House has brought out a rather vindictive side to most candidates as they vie to discredit one another in the media.

Al Jazeera's John Hendren reports from Washington DC.

Source: Al Jazeera