President Biden made a happy occasion awkward Monday night after telling a White House guest to “hush up, boy” during an event marking the Islamic holiday Eid al-Fitr. During the lively reception commemorating the end of Ramadan, Biden teased the audience with what he promised would be the “quickest speech I ever made in my life” ahead of scheduled 6 p.m. prayers. But when an unidentified audience member continued to talk over him, the president’s mood turned. “You want to come and make a speech?” the 80-year-old Biden asked the guest. “‘Hush up, boy,’ as my mother would say.” The...