BostonGlobe.com Political Headlines - May 29, 2014 May 30, 2014 Here are the top political headlines from BostonGlobe.com today: Hillary Clinton and the trouble with inevitability: It’s unclear if she will run for president in 2016, but being the presumed favorite isn’t necessarily a good thing. Joan Vennochi details the latest. Mass. House approves $1.1b convention center expansion: The expansion of the South Boston convention center is designed to make it a top US convention destination. Casey Ross reports.