Santorum 'vowed' to help Romney defeat Obama

Rick Santorum has vowed to help GOP contender Mitt Romney win the presidential election, according to his press secretary.

In an interview on CNN, Santorum press secretary Alice Stewart said Santorum offered Romney assurances when he called the presumptive GOP presidential nominee to tell him he was ending his campaign.

Stewart said Santorum assured Romney "that they'll have conversations in the next few days and weeks to come and he has vowed to do what ever it is that Gov. Romney needs to help him defeat Barack Obama in November."