McCain’s public weapon – Scott Brown: This time, McCain is importing Scott Brown. […] The Mass. Republican who won the Senate seat held for nearly five decades by the late Sen. Edward M. Kennedy — one of McCain’s partners in a career of bipartisan legislation in Washington — is making his first campaign trip as senator. His visit to Arizona today is a test of his popularity among Republican activists after he broke with the GOP leadership to side with Democrats in supporting a jobs bill soon after taking office and denying the Democrats of their super-majority in the Senate.