A Donald Trump fan interrupted a rally in Massachusetts as Vermont Sen. Bernie Sanders railed against billionaires Saturday.

Sanders, speaking at a campaign stop at the University of Massachusetts-Amherst, was making his usual campaign pitch about the disparity of wealth in the American economy when a large, bald man in a black shirt began shouting at him.

Sanders tried to raise his voice over the man multiple times, before addressing him directly.

"Here's a supporter worried about Mr. Trump's money," Sanders said.

The crowd at the event booed the man. Then, in a scene reminiscent of many Trump rallies interrupted by protests, they chanted "Ber-nie! Ber-nie! Ber-nie!" drowning out the man's words.

The heckler was eventually led out of the event by campaign staff, pumping his fist and smiling at the jeers.

Sanders, speaking with the most passion he showed during the event, used the interruption to send a message to Trump supporters in general.

"I say to Mr. Trump and his supporters that the billionaires in this country will not continue to rule this nation," Sanders shouted over cheers from supporters.

The rest of the speech was uneventful, save for an interruption by a baby that announced itself while Sanders spoke about the importance of taking care of mothers and children.

Sanders started off the speech celebrating the fourth quarter fundraising news showing that he raised $33 million in the final three months of 2015.

He said the campaign has generated donations from 2.5 million people, more than any other campaign in history, and the average donation is less than $30.

"What is revolutionary about all of that is we are showing that you can run a national campaign … without being dependent on big money," Sanders said.

He added that many people are celebrating the tone of the campaign.

"The truth is in American politics today, treating people like they are intelligent human beings is a pretty radical idea," he said.

Much of the speech focused on domestic economic issues. Sanders pointed to his personal history as his greatest lessons in economics.

He said his parents were not poor, but money was always an issue growing up in Brooklyn. Sanders said that motivates him to continue to fight against the disparity of wealth currently seen in the country.

"How about creating an economy that is not rigged? How about creating an economy that works for working families and not just a handful of billionaires?" Sanders said.

Sanders spoke about his desire to end the war on drugs, including removing marijuana from the Federal Controlled Substances Act, which places the drug in the same class as heroin.

He called for criminal justice reforms and pledged that as president he would work to keep petty criminals out of jail and find them a path back to civil society if they do end up behind bars.