Alex Spanko, Patriot Ledger, November 30, 2011 Canton - Donna Kelly-Williams won a second term as president of the Massachusetts Nurses Association in October, after overseeing a major change at the Canton-based union during her first two years in office. Two months after Kelly-Williams took the reins in October 2009, the association joined with two other nurses' unions to form National Nurses United, a Silver Spring, Maryland-based group that now represents 170,000 nurses across the country. ... Standing