From the Katherine Clark campaign, July 23: Katherine Clark invites area residents to stop by her Arlington office as she campaigns for the U.S. Congress. Clark, a Democratic state senator from Melrose, will be hosting an office party and meet-and-greet and is looking forward to talking to voters. Residents can stop by at 6:30 p.m. on Monday at the Katherine Clark for Congress campaign office, 1179 Massachusetts Ave., Arlington.