Senate Minority Leader Chuck Schumer is the highest-ranking Jewish lawmaker in the history of the U.S. Congress. It’s long been a point of pride for the New York Democrat, whose new book on antisemitism in America will soon hit shelves.

Donald Trump alleged Wednesday that Chuck Schumer, the top Democrat in the Senate, is not Jewish. “Schumer is a Palestinian, as far as I’m concerned. You know, he’s become a Palestinian,” the president said in the Oval Office on Wednesday.

President Donald Trump on Wednesday launched into a bizarre attack on Senate Minority Leader Chuck Schumer — the highest-ranking Jewish person in the American government — by inexplicably claiming that the New York Democrat was no longer Jewish during a marathon media availability alongside Irish Taoiseach Micheal Martin.