Four Democratic candidates have filed paperwork to run for the 10th Suffolk County District rep seat after Rep. Ed Coppinger announced he'd be leaving the job. After redistricting, a small part of Jamaica Plain became part of the 10th Suffolk District. The majority of the 10th Suffolk District is in West Roxbury, Roslindale, and a little in Brookline. The four candidates are Roslindale resident Robert Orthman, Jamaica Plain's Garrett Casey, and West Roxbury residents William MacGregor, and David Giordano. All four are Democrats, so they would face off in a May 2 Democratic primary.