FILE - In this March 27, 2019 file photo, Sen. Ed Markey, D-Mass., speaks during a Senate Transportation subcommittee on commercial airline safety, on Capitol Hill in Washington. Some Massachusetts voters see Markey as potentially vulnerable to a primary challenge, and one group is even trying to persuade U.S. Rep. Joe Kennedy to run for his seat. Markey has represented Massachusetts in Congress for decades _ first in the House before winning Democrat John Kerry's former Senate seat in 2013 _ but the state saw an incumbent lose just last year as Democrats elected more women and minorities. (AP Photo/Alex Brandon, File)
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