MT. PLEASANT, Mich. - Ron Paul on Saturday laughed off remarks made by fellow GOP presidential candidate Rick Santorum earlier in the day speculating that Paul and Mitt Romney have a backroom running mate deal going. "I don't know what all that meant," Paul chuckled backstage of a rally he held here at Central Michigan University. "No, we've never had a conversation, anything like that ... but he's a family person, I've known him for five years, so it is a little bit different. But I don't agree with [him on] hardly anything, probably." Santorum has openly speculated that Paul and Romney are working together. He vented his frustration at multiple events on Saturday that "in 20 debates, Ron Paul never attacked Mitt Romney." During last week's debate in Arizona, Santorum said, "I felt like messages were being slipped behind my chair." Paul admitted to reporters that he's never "volunteered" an attack on Romne...