President Obama’s re-election campaign launched Part 2 of its strategy to discredit Republican Mitt Romney this week, pouncing on his record as Massachusetts governor after more than two weeks of attacks on his private-equity years. The campaign released a five-page memo and a four-minute Web video Wednesday characterizing Romney’s leadership of Massachusetts as a failure, and senior adviser David Axelrod announced that he will host a news conference in front of the state house in Boston Thursday morning to drive home his criticism of Romney’s record. “When it comes to Mitt Romney and his economic philosophy, the facts are clear,”...