Senate Minority Leader Chuck Schumer (D-N.Y.) warned on Sunday that support for the alliance between the United States and Israel is waning among younger people.

“We need a campaign aimed particularly at the young, using the media they care about and the language they use,” he said at the annual Israeli-American Council conference in Washington, D.C.

The senator also mentioned an increase in anti-Semitism in Europe being of significant concern.

“Everyone should fight anti-Semitism—not just the Jews. If we ignore it, it will grow,” he said. “The most important thing is to speak out loudly against it. Also, legislation is important, and there is new legislation against anyone who commits hate crimes.”

He continued, saying “the poison of Europe for millennia has been anti-Semitism. [What] we should all be doing as citizens, elected leaders, is speaking out against European anti-Semitism because Jewish people are afraid to live there,” he added. “So we can’t forget overseas anti-Semitism because when it grows in one place, it spreads to another.”

Other key speakers included House Minority Leader Nancy Pelosi of California, who appeared on stage with Schumer, and Vice President Mike Pence.