UAW leaders joined Vermont Sen. Bernie Sanders (I) Saturday in Warren, Michigan, for the "Fighting Oligarchy: Where We Go From Here" tour.

More than 6,000 people packed three different auditoriums to hear from Sanders and UAW President Shawn Fain.

CBS News Detroit's Jack Springgate spoke with two cancer survivors who attended the rally.

"They're cutting children's cancer research and the NIH and also interfering with grant funding rules for medical research," said rally attendee Elliot Stephens. "I have a daughter with cancer, and that for me is unforgivable."

Stephens and his brother are also cancer survivors. They say potential healthcare cuts could have fatal consequences.

"If they cut Medicaid, that's going to hurt a lot of people," Elliot Stephens said. "Senior citizens, disabled people, single moms, children who rely on Medicaid, it's going to hurt them. People are going to die from that."

Sanders says he's visiting congressional districts that were narrowly won by President Trump in 2024 to urge those representatives to vote against a bill that could bring cuts to Medicaid, housing, education, nutrition and other social programs.

He's asking those constituents to do the same.

Whether or not they're going to vote for what we call a reconciliation bill. A big bill that will give over one trillion dollars in tax breaks to the top one percent and make massive cuts to Medicaid, nutrition, education, and the needs of the working class of this country.

Fain singled out Elon Musk for calling social security a Ponzi scheme, calling him a con man.

"It's not our grandparents, and it's not a public school teacher. It's Elon Musk and the billionaire class. And you want to talk about a Ponzi scheme? I'll tell you about a Ponzi scheme. The only Ponzi scheme we've seen in the last 40 years is the rich getting richer while the working class and everyone else gets left behind," Fain said. 

A House vote on this bill is expected to happen on Tuesday as Democrats look to flip just two Republican votes to stop it from passing.

CBS News Detroit reached out to the Michigan Republican Party for comment on Saturday's rally. We are waiting for a response.