The leading Republican presidential candidate fails to meet requirements to run for state primary elections.
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.