LENOX >> The three Democratic candidates seeking to succeed state Sen. Benjamin B. Downing will attend a forum at 11 a.m. Sunday at Town Hall on Walker Street.

The forum, to be moderated by state Rep. William "Smitty" Pignatelli, D-Lenox, will include Rinaldo Del Gallo, Andrea Harrington and Adam Hinds.

The event is co-hosted by the Lenox Town Democratic Committee and the Lenox Chamber of Commerce.

Downing represents 52 Western Massachusetts communities in Berkshire, Hampshire, Franklin and Hampden counties. It's the largest geographical district in the state Senate.

Last January, he announced he would retire from the post he has held for 10 years by not seeking a sixth term.

The three Democrats vying for Downing's seat will compete in the state Senate primary on Sept. 8.

The winner will face Christine Canning of Lanesborough, who is running unopposed as the Republican candidate for the seat on Election Day, Nov. 8.