What Would A Kennedy-Markey Primary Battle Look Like?

U.S. Sen. Ed Markey could be facing yet another primary challenger — Rep. Joe Kennedy III.

Kennedy is reportedly considering taking on Markey. If he does, he would be the third person to challenge the longest-serving member of the Massachusetts congressional delegation.

Markey has declined to comment on his primary challengers, but has said he's running for re-election no matter what.

Joe Battenfeld, political columnist at the Boston Herald and host of "Battenfeld" on Boston Herald Radio. He tweets @joebattenfeld.

Stephanie Murray, author of of the Poltico Massachusetts Playbook. She tweets @StephMurr_Jour.