Flee! The Democrats are coming to Boston Massachusetts braces for convention to cause traffic snarls; locals aim to leave Anna Badkhen, Chronicle Staff Writer Sunday, July 11, 2004 Medford, Mass. -- When the Democratic National Convention kicks off in Boston in two weeks, Medford Mayor Michael McGlynn would like to be there, mingling among some 35,000 fellow Democrats, and celebrating the presidential nomination of a Massachusetts favorite son. Instead, McGlynn said, he will be manning a red, white and blue roadblock on an interstate off-ramp in Medford, seven miles north of Boston's convention center. "Don't get me wrong," said Glynn,...