BostonGlobe.com Political Headlines - June 2, 2014 June 03, 2014 Here are the top political headlines from BostonGlobe.com today: Staffs in Mass. governor’s race struggle with diversity: Having a diverse campaign staff can be critical to tapping into a broad coalition of voters, political operatives say. Akilah Johnson details the latest. Expanded bottle law could be headed for ballot: Voters could decide whether the law should include bottled water, sports drinks, and other noncarbonated beverages. David Abel reports.