Boston City Councilwoman Ayanna Pressley, 44, defeated a 10-term Democratic incumbent Tuesday in the Massachusetts primary,  winning the Democratic Party’s nomination in the Seventh Congressional District.

Facing no Republican challenger, Pressley is set to become the state’s first Black woman in Congress — the latest sign of growing power among candidates of color in the Democratic Party.

Pressley defeated U.S. Rep. Michael Capuano 59-to-41. She ran on liberal priorities that include protecting the rights of immigrants and women, reducing gun violence and anger against Republican President Donald Trump.

Her win echoes the growing list of victories for candidates of color. New York’s Alexandria Ocasio-Cortez pulled off a similar upset over a long-time incumbent, and Minnesota state Representative Ilhan Omar is expected to become the first Muslim woman elected to Congress.

Tallahassee Mayor Andrew Gillum secured the Florida Democratic nomination for governor and became Florida’s first African-American gubernatorial nominee. Stacey Abrams, the Democratic nominee for Georgia governor, could become the first African-American woman governor if she wins. Other women of color rising in the Democratic Party include Lauren Underwood in Illinois, Jahana Hayes in Connecticut, and Lucy McBath in Georgia — all nominees for their congressional districts.

“Pressley wasn’t just running on a progressive message, she was arguing that her own experience as a person of color made her more qualified to represent the district than an older white man — no matter how liberal,” Vox reported.

People of color make up the majority of the Seventh Congressional District, which includes most of Boston. But white people make up the majority of the voters there, according to local public radio station WBUR.

There weren’t many policy differences between Capuano and Pressley, according to Vox. One of them, known as the “Blue Lives Matter” bill, would make assaulting a police officer a federal crime. Capuano and the rest of the Massachusetts Congressional delegation voted for the House version of the bill. Pressley criticized that.

Democrats need 23 seats for a majority in the House of Representatives, and they need two seats to control the Senate.

“With our rights under assault, with our freedoms under siege, it is not good enough to see the Democrats back in power,” Pressley told supporters Tuesday. “It matters who those Democrats are.”

The Democratic base is far more diverse than the representatives they have in Congress, said Joshua Dyck, a professor of political science at the University of Massachusetts at Lowell. “Increasing that diversity helps the party’s brand,” Dyck told Reuters.

Pressley campaigned on being a disruptive presence in Washington. “I knew this was going to be lonely,” she said. She failed to get the endorsement of some major power brokers in the Democratic establishment like the Congressional Black Caucus PAC, which backed Capuano, Politico reported.

“If folks are going to be about the business of rolling back every civil right protection bit of progress that we’ve made, decades of progress, what I’m going to be focused on is fighting like hell to make it very hard for them — and very painful — every step of the way,” she said during the Women Rule podcast on Apple:

“When you are shifting culture and ushering in new paradigms and challenging thinking, and people are still stuck in a very specific way of doing things, you can’t be mad at them,” she said. “But I just think, given what’s happening in Washington, that we have to be disruptive.”