PITTSFIELD — When U.S. Sen. Elizabeth Warren asked the crowd at the Colonial Theatre whether they or someone they love relies on Medicaid, nearly every hand in the packed audience went up.

That show of support for publicly funded health care set the tone for Saturday morning’s town hall, where the Massachusetts Democrat also rallied against billionaire tax breaks and proposed cuts to social safety nets she said are included in President Donald Trump’s “One Big Beautiful Bill Act,” which passed the House and is up for a Senate vote.

It’s unclear how much of the House bill will remain intact as it heads through the Senate. On Friday night, the Senate parliamentarian struck down the bill’s proposed cuts to the Supplemental Nutrition Assistance Program (SNAP), which did not comply with rules imposed on the bill that shield it from a filibuster.

Pittsfield Mayor Peter Marchetti and state Sen. Paul Mark, D-Becket, introduced Warren, who voiced concern over Trump’s then-looming decision on U.S. involvement in the Israel-Iran war and what she called a lack of strategy behind it. After the event, U.S. forces attacked nuclear forces in Iran.

“Our service members who volunteer to give so much have a right to know that the president of the United States values their lives and sends them into harm’s way only when we clearly have a plan,” Warren said. “Donald Trump has not done that, and I will fight him every inch of the way.”

Warren said Trump’s proposed budget, which she called a “betrayal of the American people,” would threaten critical programs like Medicaid, education funding and climate initiatives, while prioritizing tax breaks for billionaires.

“Let me be clear,” she said. “No one should be pushed out of a nursing home so Elon Musk can build a rocket ship to Mars.”

She spent much of the event defending publicly funded health care, describing how Medicaid, which is called MassHealth in Massachusetts, helps pregnant women, children with disabilities and seniors in long-term care. Under the “big bill,” almost 11 million people would lose health coverage through proposed changes to the Affordable Care Act and Medicaid.

“About half of all newborn babies in our country rely on Medicaid to pay those bills,” Warren said. “So what we decide as a country is we’re all going to pitch in some of our nickels, and then if it’s your family, then we’ll all be there to help support.”

The town hall also addressed rising fears over recent Immigration and Customs Enforcement arrests, and the little publicly released information about who was taken, why they were taken or where they were sent. Warren called those tactics “deeply un-American” and condemned ICE’s lack of transparency.

“[This] is a moment when people are being snatched off the street by ICE by people who are wearing masks, who don’t identify themselves, who stuff people into unmarked vans, who bust out car windshields [and] who hang out at elementary schools,” she said.

Warren linked the federal government’s actions on immigration and cuts to research and health care to a larger fight for democracy, accusing Republicans in Congress of “bowing down” to Trump, whom she called “the most openly corrupt human being to serve as president.”

“The Republicans in Congress are suffering a major medical emergency. They’ve had their spines removed,” she said to loud applause.

After her speech, Warren took questions from audience members selected at random using a number-drawing system.

In response to a question from Pittsfield resident Jurian Hughes about Democratic messaging, Warren admitted the party failed to make its economic message clear. She said they’re now working to better highlight how Republican proposals benefit billionaires and how Democrats want to create “more opportunity and a more sustainable future for your family.”

Kathy Mason mentioned the success of the recent “No Kings” protests against the Trump administration, which thousands attended across the Pioneer Valley, and asked about creating a fundraiser for democracy. Warren praised the idea and took the opportunity to repeat the message she had emphasized throughout the morning: speak out and stay involved.

“In the United States of America, we do not bow down to kings,” Warren said. “Tell your stories. … We are in this fight, because we know what’s right. We know how much is on the line and we know that we have to be strong. We know we must persist.”