In a political stunner, the current US Democrat, Michael Capuano, lost Tuesday's primaries to Ayanna Pressley, a city councilor from Boston who is almost certain to become the first black woman to serve Massachusetts in Congress.
The 44-year-old anger over a ten-term congressman underscores the change underway in a Democratic Party whose basis is the search for younger and diverse candidates who adopt progressive politics.
His victory comes just two months after Alexandria Ocasio-Cortez similarly defeated a top leader of the House of Representatives in a primary election in the New York Congress.
Ocasio-Cortez on Tuesday night tweeted a selfie of both women and wrote: "In June, I won my elementary school, tonight, she won yours, here is November.
In a political stunner, the current US Democratic representative UU Michael Capuano lost Tuesday's primaries to Ayanna Pressley (above), a city councilor from Boston who is almost certain to become the first black woman to serve Massachusetts in Congress
Meanwhile, a member of the Pressley campaign posted a video showing the candidate at the time she knew she had won.
Pressley, the first black woman to serve on the council, is now on her way to represent an area of Massachusetts that was once served by Democratic icons Tip O'Neill and John F. Kennedy.
"The change is coming and the future belongs to all of us," Pressley said Tuesday night to enthusiastic fans.
A subdued Capuano told supporters that he did everything he could to win re-election.
"Apparently, the district is very upset with a lot of things that are happening, I do not blame them, I'm as upset as they are, but so be it, that's life," he said.
The race between Capuano and Pressley was perhaps the most followed contest in Massachusetts, especially since Pressley made comparisons with Ocasio-Cortez.
The Seventh Congressional District is the only one in the state where minorities make up the majority of the population.
"This is a fight for the soul of our party and the future of our democracy," Pressley said Tuesday while campaigning in the district.
"And a reliable vote is not good enough."
Capuano is considered one of the most liberal members of the Massachusetts delegation, and Pressley had acknowledged that he had few important political disputes with him.
There is no Republican on the November ballot in the district, which means that Pressley is virtually certain to enter Congress in January.
Capuano (above) is considered one of the most liberal members of the Massachusetts delegation, and Pressley had acknowledged that he had few major fights with him
The last Democratic primary defeat in Massachusetts came in 2014, when Seth Moulton defeated Representative John Tierney in the 6th congressional district of the state.
US Democratic Senator Elizabeth Warren sailed through her primary without opposition.
He will face Geoff Diehl, a state representative who served as co-chair of President Donald Trump's 2016 campaign in the state and defeated two other Republicans for his party's nomination.
Another veteran congressman, Democratic Rep. Richard Neal, won a lively primary confrontation with Tahirah Amatul-Wadud, a black lawyer from Springfield who hoped to become the first Muslim to serve in the Massachusetts Congress.
Neal, the dean of the delegation of the lower house of the state, was elected for the first time in 1989.
Two other Democratic House holders, William Keating and Joe Kennedy, defended themselves against the main challenges on Tuesday.
Kennedy, grandson of the late United States Senator Robert F. Kennedy, delivered the Democratic response to Trump's State of the Union address earlier this year.
Another Democrat, the representative of the United States Niki Tsongas, withdrew at the end of this period, and that open seat provoked a political struggle with 10 candidates in the Democratic primary election.
Republican Governor Charlie Baker won his party's nomination for a second term, defeating Scott Lively, a conservative and staunch defender of Trump, who frequently called Baker, a frequent critic of the president, a RINO, or Republican on Name Only. .
Baker will face Democrat Jay Gonzalez in November.
Baker, a moderate who has been popular among voters in what is perceived as one of the bluest states in the country, will face Gonzalez, who served as secretary of administration and finance under Democratic Gov. Deval Patrick.
"At a time when our country is struggling to find common ground on many issues, in Massachusetts we are the exception," Baker told supporters.
"We believe that people in public life can, and should, discuss issues respectfully and seek common ground whenever possible."
Neither Gonzales nor his main opponent, Democrat Robert Massie, an old political and environmental activist, were known outside party activist circles.
Both argued that Baker's support among voters was smooth and that his administration had not made significant progress in many areas, particularly the problems affecting the Boston-area transit system known as "T."