During the campaign, Capuano touted his credentials as an "unabashed liberal", but he found himself competing with Pressley over who was the more progressive candidate.
Ayanna Pressley, poised to be the first black woman to represent MA in Congress, canceled a campaign event the day after her groundbreaking victory due to health reasons. She leant on her identity, and argued that, as a black woman, she was more fitting to represent her ethnically diverse district. John Kerry and Rep.
The air was electric and full of voters yelling "change can't wait" in a Boston union hall, as they celebrated the unseating of a 10-term congressman by a 44-year-old African American Boston city councilor. It includes both Cambridge's Kendall Square - development there is booming - and the neighborhood of Roxbury, the center of Boston's traditionally black community.
She enjoyed a boost in the race's final weeks thanks to endorsements from both Massachusetts Attorney General Maura Healey - who has made a name for herself by suing the Trump administration - as well as the Boston Globe, the state's paper of record.
Ms Pressley's victory comes two months after a similar win against a 10-term opponent by 28-year-old Alexandria Ocasio-Cortez in NY.
And in MA, primary voters headed to the polls Tuesday.
Baker, a moderate who has been popular with voters in what is perceived as one of the nation's bluest states, will face Gonzalez, who served as secretary of administration and finance under Democratic Gov. Deval Patrick. He had an A rating from the NAACP and hosted campaign events with civil rights icon Rep.
Former Sen. Jon Kyl to replace McCain in the Senate
She's a former Air Force colonel and the first female combat pilot. "Kyl always had the office door open for his constituents". Arizona voters will get to decide who should fill McCain's former seat in the 2020 election and then again in 2022.
Ayana Pressley: African-American woman wins MA primary
Pressley won the Democratic nomination for Massachusetts' 7th Congressional District, defeating Democratic Rep. In a speech after her win, Ms Pressley said: "Change is coming and the future belongs to all of us".
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On Friday, a senior USA official emphasized that Washington was ready to move ahead with just Mexico if Canada failed to sign on. The withdrawal process would require Trump to give Mexico and Canada 6 months' notice of his intent to leave the pact.
Hillary Clinton carried the district by 72 points in 2016.
The 7th District is heavily Democratic, and Pressley is now expected to coast to victory in November.
Elsewhere in the state, Congressmen Joe Kennedy, 37, won a comfortable victory in his primary and fellow Democrat Richard Neal, 69, fended off a younger challenger.
With all precincts reporting, Pressley topped Capuano by about 17 percentage points overall - 58.6 percent to 41.4 percent - per the unofficial results.
The incumbent, who has held the seat for nearly 30 years, had a heavy financial advantage, raising $2.5 million through August 15 to Amatul-Wadud's $113,000.
The last time an incumbent Democratic House member lost a primary was in 2014, when Seth Moulton defeated former Rep. John Tierney, who brought significant personal baggage to the campaign. How closely existing Democratic leaders will take note is yet to be determined.