BostonGlobe.com Political Headlines - May 20, 2014 May 20, 2014 Here are the top political headlines from BostonGlobe.com today: Arrests, fines follow Mass. medical marijuana law: Persistent confusion has led to criminal charges or civil citations against people who thought they were playing by the rules. Kay Lazar and Shelley Murphy detail the latest. Brown v. Board, busing, and Boston: Resentment over busing still runs deep here, even 60 years after the Brown decision. Farah Stockman details the story. Unions back PAC with anti-Baker website: It was not clear who or what was backing the PAC, which can raise unlimited amounts of money from people, labor unions, and corporations. Joshua Miller reports.