Democrats seek to curb attack ads... Dukakis heads watchdog panel... The state Democratic Party has created a four-member panel, headed by former governor Michael S. Dukakis, that will review campaign advertisements and publicly rebuke candidates who use negative attacks. Party chairman Philip W. Johnston created the panel and will serve on it, along with Dukakis and Cameron F. Kerry, brother of US Senator John F. Kerry; and Katherine M. Clark of Melrose, a former state Senate candidate who is chairing a statewide campaign effort for the Democratic Party. Johnston, elected party chairman in 2000, said he believes that a major...