With just over two weeks to the next round of Republican presidential primaries in the US - the battle for people's votes has hit the airwaves.

As the presidential elections approaches, politicians are using the politics of fear in their ad campaigns.

In his latest ad Republican contender, Rick Santorum, has conjured up a doomsday scenario of what could happen if President Barack Obama is re-elected.

Al Jazeera's Rob Reynolds reports from Los Angeles.

Source: Al Jazeera