The country’s most prominent group of Jewish Republican political donors said Tuesday that it was “disappointed” that Representative-elect George Santos had misrepresented himself as Jewish, and that it would bar him from its events. But the group, the Republican Jewish Coalition, stopped short of calling for him unfit to serve in Congress or demanding his ouster. Mr. Santos, a Republican who was elected last month to represent a New York district that includes much of Long Island’s North Shore, has been embroiled in a widening scandal over misstatements and lies he told about his education, employment and finances. He also...