FILE - In this pair of June 1, 2020, file photos, Rep. Joe Kennedy III, left, and Sen. Edward Markey, D-Mass., right, wait for the start of a debate in Springfield, Mass. Kennedy is a candidate and Markey is the incumbent in the Sept. 1 Democratic primary election for Senate. (Matthew J. Lee/The Boston Globe via AP, Pool, File)

FILE - In this pair of Aug. 17, 2020, file photos, Holyoke Mayor Alex B. Morse, left, and U.S. Rep. Richard E. Neal, D-Springfield, right, wait for the start of a debate in Springfield, Mass. Morse is a candidate and Neal is the incumbent in Massachusetts' 1st congressional district in the Sept. 1 Democratic primary election. (Don Treeger/The Republican via AP, File)

About 20 supporters joined Holyoke Mayor Alex Morse, foreground right, candidate for Congress, with the Morse Force in North Adams, Mass., Sunday, Aug. 30, 2020, as part of 23 public events in 15 communities across the First Congressional District between Saturday and Monday. (Gillian Jones/The Berkshire Eagle via AP)