Could it really be Rick?
Rick Santorum continues to nip at Mitt Romney's heels in the race for the Republican's US presidential candidacy. Stepping back from the fray in Washington's Rock Creek Park, Edward Luce, US columnist, assesses Mr Santorum's chances in next week's primaries.
Produced and filmed by Christopher Booker. Additional footage from Reuters, Getty Images & The Living Room Candidate - http://www.livingroomcandidate.org