BostonGlobe.com Political Headlines - June 4, 2014 June 05, 2014 Here are the top political headlines from BostonGlobe.com today: Candidates for governor earn big sums in side ventures: The reports open a window into the finances of the gubernatorial candidates beyond what many discuss on the campaign trail. Michael Levenson reports. Chance for union-backed mayor to tackle labor costs: More than anyone, Mayor Martin J. Walsh is uniquely qualified to make Boston a city where working families are welcome again. Shirley Leung details the latest. Mayor Walsh says he should have been told about plaza repairs: The mayor sharply criticized a decision to make emergency repairs on a weakened platform at City Hall Plaza without alerting him. Meghan E. Irons reports.