BOSTON — The state’s senior senator will seek a third term, her campaign has announced with a new ad.

U.S. Sen. Elizabeth Warren, a former candidate for the Democratic presidential nomination, is once again asking Massachusetts voters to send her back to Washington for another six-year term, telling them 12 years into her service there is still much work to do.

“I first ran for Senate because I saw how the system is rigged for the rich and powerful and against everyone else. I won because Massachusetts voters know it, too. And now I’m running for Senate again because there’s a lot more we’ve got to do,” Warren says in the ad.

Born in Oklahoma, the former Harvard Law professor was a vocal critic of unregulated banking and big business long before her 2012 election victory against Republican Sen. Scott Brown sent her to congress.

Her decision to seek the presidency in 2016 didn’t seem to hamper her subsequent 2018 reelection campaign against former state Rep. Geoff Diehl, a race she won by 24 points after an uncontested primary.

Warren, 73, is the state’s ranking but younger senator, trailing a few years behind 76-year-old Sen. Ed Markey.

“Elizabeth is my partner in the Senate – and I have seen this perpetual energy machine up close. Passing a tax on greedy corporations paying zero taxes? She got it done. Making billionaires cry on TV? Done,” Markey says in the ad, referencing a 2019 television appearance by hedge-fund manager Leon Cooperman, in which the billionaire grew visibly emotional when attacked by Warren.

The ad highlights Warren’s long record of standing against the bail-out of failed financial institutions while working class families struggle and her work to lower the cost of goods needed by seniors, like hearing aids, and to forgive student loans.

Boston Mayor Michelle Wu and U.S. Rep. Ayanna Pressley both make appearances in the ad.

“It’s always impossible, until it’s done. She never loses sight of the people,” Pressley said. “She never forgets that policy is about people’s lives.”

“She won billions in funding for projects across our state, like a new electric school bus fleet, to help achieve a city Green New Deal!” Wu said.