Protesters disrupted a Brooklyn Chamber of Commerce forum featuring most of Brooklyn's congressional delegation Monday, repeatedly shouting down Republican Congressman Dan Donovan for his support of President Donald Trump's Muslim ban.

The event, part of a regular series held by the chamber, got off to a quiet start, with chamber President Andrew Hoan seeking to gloss over tensions in his opening remarks. He called for those gathered to "come together in peace" and "keep our hearts open."

But the sense of comity broke down when Donovan, who was joined by Representatives Nydia Velazquez, Carolyn Maloney, Hakeem Jeffries, and Yvette Clarke, was introduced.

Protesters, many constituents of Donovan's from Bay Ridge and Staten Island, rose to their feet, holding up signs with anti-ban slogans like "Ban Dan" and "Bay Ridge Will Remember 2018."

An apparently sympathetic audience clapped, as a police officer informed the protesters that they would have to sit down or be escorted out.

One protester, marching out of the auditorium, turned back to the crowd and shouted, "Black lives matter! My son has a disability. Protect the ACA! Muslim lives matter!"

Rep. Donovan, you may recall, was the District Attorney on Staten Island when a grand jury declined to indict the NYPD officer who put Eric Garner in a fatal chokehold. (James Cohen, a law professor at Fordham University who specializes in criminal procedure, told us at the time that "there is no question that a grand jury will do precisely what the prosecutor wants, virtually 100% of the time.")

"You don't represent us, Dan Donovan," another protester woman shouted to loud applause.

Later in the event, Donovan attempted to explain his position to the audience. "Our enemy ISIS has told us that they are going to compromise the Syrian refugee program," he said, calling Trump's order a "pause" rather than a ban. "This pause is an inconvenience," he said, to laughter from the audience.

"It's a ban and people feel unsafe in your district," a protester called out.

"The compassion of the United States can still be expressed to the Syrian people," Donovan continued.

"After they're dead?" a protester asked loudly.

Cindy Trinh, 33, held up a large sign saying, "Daughter of Vietnamese Refugees Against The Ban," and screaming, "No Muslim Ban, Ban Dan Ban Dan!"

Outside the auditorium, Trinh, a freelance photographer and photojournalist from Bay Ridge, explained her protest. "I am the daughter of Vietnamese refugees," she said, her voice breaking. "And whenever I talk to my parents I feel for the Muslim people of this country so much."

Trinh pointed to the significant Arab and Muslim population in Bay Ridge and blasted Donovan for what she said was a failure to represent his own constituents.

"They live in Bay Ridge and he supports the banning of them. How can they support their own congressman? How can they live in Bay Ridge feeling safe that their congressman doesn't even have their back."

The crowd was largely friendly to the four Democratic representatives, all of whom spoke against the ban.

Clarke said she was committed to standing against the ban. "We know we're better than this," she said.

"It's about human lives. It's about our standing around the world," Velasquez said. "The reality is that this has been the most painful experience for me as a legislator who has been in office for 24 years. We expect from our government more—and better."

In a statement to Gothamist, Hoan said the chamber had expected a lively conversation. "We were aware that getting our Brooklyn delegation together was going to elicit some exciting dialogue," he said. "The right to assemble, when it does not disrupt our speakers, is one that we understand and support and we were able to make sure that it did not get out of hand for the rest of our audience and invited guests."

Outside the event, a small group of protesters held up their signs and chanted anti-Trump slogans.

The protests were apparently organized independently by a number of local groups, including Staten Island for Change and Bay Ridge For Social Justice.

Marty Izaak, 72, an engineer who said he'd been to several chamber events and had attended to see "what's going on in Brooklyn," walked past the protesters disinterestedly.

"I think it's not fair. Because they don't let people speak," he said.

Asked about the ban, Izaak said he had no opinion. "I'm neutral," he told Gothamist.

Donovan told Gothamist by email that he welcomes constituent input but that he was unhappy with the forum the protesters selected to express their beliefs. I'll meet with any constituent who wants to share his or her opinions and concerns," he said via email. "We can disagree, but to shout down opinions because they're different from your own contradicts the basic concept of open discourse and deprives others of an opportunity to hear from every side."

Abdullah Younus, 26, a protester from Bay Ridge, echoed the theme that Donovan had left the residents of Bay Ridge out to dry. He said he was pretty satisfied with the protest. "We continue to disrupt the atmosphere, draw attention our cause," he said. "There's been a lot of cheering, not just from people here with the protest, but also people that simply came to attend."