by Claudine Zap When Scott Brown successfully campaigned for the late Edward Kennedy 's vacant Senate seat, he used a pickup truck. Now to raise money for the upcoming election, he's trying a new tactic: Rachel Maddow . The liberal MSNBC talk-show host was called out in a fundraising email from the senator, which claimed that she would be running against him in 2012. While Maddow would fit the bill of a Massachusetts liberal (she has a house in the Western part of the state),