With just over 2 weeks to the next round of republican presidential primaries in the US - the battle for people's votes has hit the airwaves.
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.
As the presidential elections approaches, politicians are using the politics of fear in their ad campaigns.
Al Jazeera's Rob Reynolds reports from Los Angeles.
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