Hillary Clinton spent Tuesday evening with top Jewish donors at a fundraiser hosted by Jack Bendheim in Riverdale, New York, Jewish Insider learned.

Bendheim, president and chief executive at Phibro Animal Health Corporation, served as deputy chairman of AIPAC and has deep ties to the Orthodox Jewish community in New York.

In 1999, when Clinton ran for the U.S. Senate in New York, Bendheim served as a bundler and an advisor on Israel. “I basically advised her that the most important thing she could do is to keep promoting the peace process,” Bendheim told the Jewish Week at the time. “He is one of few Orthodox Jews to have a close relationship with Clinton,” the publication wrote.

Vermont Senator Bernie Sanders beat Clinton in the Wisconsin primary on Tuesday. The win will net him a handful of delegates, but he still lags Clinton in the delegate count in order to win the Democratic presidential nomination.

The next major contest in on April 19 in New York presidential primary. “We are headed to New York,” Sanders said in his victory speech. “I know a little bit about New York because I spent the first 18 years of my life in Brooklyn, NY.”

Suggesting that Clinton is getting nervous, Sanders said, “I believe we have an excellent chance to win New York.”

Recent polls show Sanders trailing Clinton in New York by 10 points.