BostonGlobe.com Political Headlines - August 6, 2014 August 07, 2014 Here are the top political headlines from BostonGlobe.com today: Ex-aide plans to sue state auditor: The former top deputy to state Auditor Suzanne Bump said she conducted reelection activities out of her State House office. Jim O’Sullivan reports. Firms bemoan stalled changes on visa limits: Business leaders are frustrated the standoff over immigration is preventing an expansion of work visa programs for high-skilled workers. Tracy Jan reports. Martha Coakley releases 3 years of tax returns: Attorney General Martha Coakley and her husband averaged $215,143 in total income over the last three years, according to filings. Joshua Miller details the latest.