Seth Moulton closing gap on progressive Democrat Ed Markey in Massachusetts Senate primary

Rep. Seth Moulton is closing in on Sen. Ed Markey in the Massachusetts Senate primary, with a new poll showing Markey leading by 5 points. Markey has the backing of the Democratic establishment and Sen. Elizabeth Warren, while Moulton has been endorsed by groups like VoteVets PAC. The primary will be held on Sept. 1.