Hillary Clinton has condemned Donald Trump, calling him shameful, dangerous and declaring: “I no longer think he’s funny.” Clinton launched her attack on the billionaire Republican frontrunner during an appearance on NBC’s Late Night with Seth Meyers on Thursday, sparking loud applause from the audience. In the aftermath of attacks by Islamic extremists in Paris and in San Bernardino, California, Trump has called for monitoring mosques and barring Muslims from entering the United States.

“I think for weeks, you know, you and everybody else were just bringing folks to hysterical laughter and all of that,” Clinton told the host. “But now he has gone way over the line. And what he’s saying now is not only shameful and wrong – it’s dangerous.” Trump’s rhetoric was harming the nation’s ability to fight the rise of the Islamic State, feeding the group “propaganda” it could use to recruit, Clinton said. “This latest demand that we not let Muslims into the country really plays right into the hands of the terrorists,” she said.

“I don’t say that lightly, but it does. He is giving them a great propaganda tool, a way to recruit more folks from Europe and the United States. And because it’s kind of crossed that line, I think everybody and especially other Republicans need to stand up and say ‘Enough, you’ve gone too far.’”

Clinton has previously denounced Trump’s proposal while trying to tie his bombastic views to those of the rest of the Republican party. “Some of his Republican rivals are saying that his latest comments have gone too far,” she said during a campaign stop in New Hampshire on Tuesday. “But the truth is many of them have said extreme things about Muslims. Their language may be more veiled than Trump’s but their ideas aren’t so different.”

Republicans have also been swift to condemn Trump. His rival for the GOP nomination, Senator Lindsey Graham, told the Guardian that “Donald Trump today took xenophobia and religious bigotry to a new level”, while former vice-president Dick Cheney said in a radio interview that Trump’s plan “goes against everything we believe in”.

House Speaker Paul Ryan disavowed Trump’s proposal, saying: “This is not conservatism.”

Despite the backlash Trump’s divisive rhetoric seems to have struck a chord with Republican voters. More Republicans favor his proposal to ban all Muslims from entering the United States than oppose it, according to a poll from NBC News and the Wall Street Journal. In a New York Times CBS News poll released on Thursday the real estate mogul received support from 35% of Republican primary voters nationally.

The poll also found that seven in 10 likely Republican primary voters believed Trump was well-equipped to confront the threat of terrorism, with four in 10 “very confident” he could respond to the threat.

After discussing Trump, Meyers moved the conversation with Clinton to gun control, pressing the Democratic frontrunner to explain why advocates had “failed to connect” with the oft-cited “vast majority of responsible gun owners” who say they would be supportive of certain reforms. Clinton broke into prolonged laughter. “He’s a great host,” she offered. He also liked to give tours and was “kind of vegan-ish”, which could be helpful when creating menus, she said. And how would she keep the former president out of the situation room? Without missing a beat, Clinton responded that she might not want to keep him out, noting that past presidents had sought his assistance in the past.

The Obama administration, for example, sent Bill Clinton to North Korea to win the release of two American journalists. She recounted the episode, describing her surprise when the nation’s then-leader Kim Jong-il said he would turn the journalists over to a “distinguished American” and requested her husband. “We kept offering names of the distinguished Americans and none of them were acceptable and we couldn’t figure out: is this real or not?” she said. “Eventually they said ‘No, we would really like President Clinton to come.’ And that was a little awkward. I was secretary of state.” At the end of the interview Meyers asked Clinton to respond to a series of questions about the early voting state – and the host’s home state – of New Hampshire. “Who won the 2008 New Hampshire Democratic primary?” Meyers asked. Beaming, Clinton gave a jazz hands cheer. “Me!”