The grandson of former US President Jimmy Carter says he persuaded the source who secretly taped Republican Presidential nominee Mitt Romney at a private fundraiser to release the full video to the media.

James Carter IV says he was intrigued after seeing what he describes as a short, mysterious clip of Romney talking about Chinese factory conditions.

He told The Associated Press that he tracked the source down on Twitter in August and convinced them to trust a Journalist at Mother Jones magazine with the clips. Mother Jones released the video yesterday.

On the video, Romney is seen telling donors that nearly half of all Americans think they are entitled to Government help. He also says the Palestinians are not interested in peace with Israel.