Notching yet another major upset win for the progressive movement over a corporate-funded establishment opponent, Boston city councilor Ayanna Pressley ousted 10-term incumbent Rep. Mike Capuano (D-Mass.) Tuesday night in a landslide victory that provided further evidence of grassroots hunger for transformational change within the Democratic Party.

"The only way we can beat the hate coming out from Washington is not with a vote—it's with a movement!"

—Ayanna Pressley

While Capuano is well-respected Democrat who built a solidly progressive voting record over his 20 years in Congress, Pressley argued that—in the age of Trump—Massachusetts' seventh congressional district and the nation need "bold, activist leadership."

"You saw what I saw: That these times demanded more from our leaders and our party," Pressley declared in her victory speech in Boston Tuesday night. "It's not just good enough to see the Democrats back in power. It matters who those Democrats are."

"It seems like change is on the way," Pressley added. "For the residents of the seventh congressional district, change can't wait."

"For the residents of the 7th congressional district, change can't wait, and

To the many families like my own, it felt like it was us against the world, that felt government didn't represent us and didn't see us, change can't wait." @AyannaPressley pic.twitter.com/Wqy2oh0at8 — People For Bernie (@People4Bernie) September 5, 2018

Pressley—who is expected to win in November and become the first black woman to represent Massachusetts in Congress—contrasted her message of bold, movement-based politics with Capuano's decision to continue taking corporate PAC money and his refusal to embrace the growing grassroots call to abolish Immigration and Customs Enforcement (ICE).

"Let's push together to make Medicare for All, tuition free college, and living wages a reality in America—all without corporate PAC money."

—Alexandria Ocasio-Cortez

"A progressive voting record in the most progressive seat in the country is not enough," Pressley said during a recent campaign event. "The only way we can beat the hate coming out from Washington is not with a vote—it's with a movement!"

If recent upset victories for left-wing candidates in New York, Florida, Pennsylvania, and now Massachusetts are any evidence, this movement to oust the old guard of the Democratic Party and usher in young, ambitious progressives willing to challenge the traditional boundaries of American politics is rapidly gaining steam.

"This is not just a blue wave; this is a movement that's coming to Congress," New York congressional candidate Alexandria Ocasio-Cortez said during a June appearance with Pressley, before either woman had defeated their supposedly safe Democratic opponents.

In a tweet Tuesday night, Ocasio-Cortez congratulated Pressley on her landslide victory and declared, "Let's push together to make Medicare for All, tuition free college, and living wages a reality in America—all without corporate PAC money."

Congratulations to my sister in service, @AyannaPressley, on continuing her historic path into Congress tonight. Let’s push together to make Medicare for All, tuition free college, & living wages a reality in America - all without corporate PAC money. https://t.co/o2SbtUkByS SCROLL TO CONTINUE WITH CONTENT Never Miss a Beat. Get our best delivered to your inbox.





— Alexandria Ocasio-Cortez (@Ocasio2018) September 5, 2018

Speaking to the New York Times Tuesday night, Boston-based Democratic strategist Mary Anne Marsh argued that Pressley's victory is "a big wake-up call to any incumbent on the ballot in November."

In the end, Pressley will win #MA07 by 18 points. No poll showed her beating Capuano. — Dave Weigel (@daveweigel) September 5, 2018 Listen to me. @AyannaPressley just shook up the world with her congressional victory. She just defeated a 10 term establishment Democrat and did it on her own terms with a progressive platform of real change. We believe in you Ayanna! pic.twitter.com/3EAkKloALN — Shaun King (@shaunking) September 5, 2018 We are unstoppable, another world is possible. — People For Bernie (@People4Bernie) September 5, 2018

In contrast to Capuano, who enjoyed the backing of prominent congressional Democrats as well as Boston's mayor, Pressley received "little-to-no Democratic Party establishment support," noted the Post's Amber Phillips.

But, as Pressley declared in her victory speech Tuesday night, this lack of establishment support was overcome by a movement of "people who feel seen and heard for the first time in their lives."

"That is the real victory, that is bigger than any electoral victory," Pressley concluded. "And I want to thank you all for being foot soldiers in this movement and for ushering in this change."