September 4, 2018
Boston City Councilor Ayanna Pressley celebrates victory over U.S. Rep. Michael Capuano, D-Mass., in the 7th Congressional House Democratic primary, Tuesday, Sept. 4, 2018, in Boston. (Steven Senne/AP Photo)
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BOSTON — In a political stunner, incumbent Democratic U.S. Rep. Michael Capuano lost Tuesday's primary to Ayanna Pressley, a Boston city councilor who is virtually assured of becoming the first black woman to serve Massachusetts in Congress.