On the eve of Tuesday’s presidential primary in Massachusetts, the state Democratic Party is attacking Republican candidate and former Bay State Governor Mitt Romney. In a conference call with reporters, Democratic Party Chairman John Walsh and Newton Mayor and former Senate candidate Setti Warren criticized Romney’s economic record in Massachusetts. “Romney wasn’t very good at generating jobs. He didn’t work very hard at it,” Walsh said, attacking a central tenet of Romney’s platform, which is that he is the candidate best suited to deal with the economy.