Art Estopinan, from Baltimore, claims Donald Trump 'saved' ten-month-old Charlie by offering him free care because his doctors were about to switch off his life support.
Mr Estopinan's son Art Jr was given two months to live in 2011 and could only move his eyes but six years later he can move his hands, fingers, feet and arms and is a 'strong and happy boy'.
A furious Mr Estopinan said: 'Charlie Gard is a human being who deserves the chance to live', adding: 'What right do you have to play God? What this guy is saying is false - you sir are 100 per cent wrong'.
Charlie Gard would need Great Ormond Street doctors to waive their legal ban won in London and Strasbourg to allow him to fly to America for treatment.