The issue focused on the US at a time when one of its own was under attack.

"I do not know who is going to be your next president, and I can't think of any other person in this country that you have an interest in," he said, then went on to call for "a very hard look" at what his government has been doing.

Santorum's campaign had only just started. The day after the release of the video, and with his support now being