Presidential candidate Bernie Sanders (I-Vt.) stopped by “The Tonight Show” on Tuesday night to discuss his sweeping climate change plan and discuss the ongoing controversy surrounding Islamophobic comments made by Donald Trump.

Sanders told host Jimmy Fallon that unless the world can get it’s act together, “we are on a suicidal course” that will leave future generations with a world that is “much less habitable than the planet we enjoy.”

“We have a serious, serious problem,” he continued. “We have a moral obligation for our children and our grandchildren to leave them a planet that they can enjoy.”

His comments came on the heels of the ongoing climate change summit in Paris, where more than a hundred world leaders are working to create a binding agreement to limit greenhouse gas emissions.

The senator also used his visit to criticize Trump and his recent proposal to “ban” any Muslims from entering America.

“Throughout history, you’ve had demagogues trying to divert attention away from the real issues … what somebody like a Trump is trying to do is divide us up.” Sanders told Jimmy Fallon. “A few months ago we were supposed to hate Mexicans and … now we’re supposed to hate Muslims. And that kind of crap is not going to work in the United States of America.”

Trump’s proposal has been widely panned, but Republican lawmakers have said they would still stand by him should he win the nomination.

Watch a clip above, courtesy of NBC.

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