TOKYO—The United States men’s team won their first gold on the track at the Tokyo Olympics on Saturday, clinching the 4×400 meters relay by a huge margin to end a drought that had sparked fierce criticism back home. The American men were bidding to avoid the ignominy of not winning a gold on the track for the first time in the Games’ 125-year history—barring their boycott year in 1980—and they left it to the very last event. The U.S. team of Michael Cherry, Michael Norman, Bryce Deadmon and Rai Benjamin took the lead early and surged ahead of their challengers to take victory in a season’s best 2:55.70. Netherlands took the silver medal in a national record time of 2:57.18 and Botswana claimed the bronze. Ryan Crouser, who retained his shot put title on Thursday, was the only gold medalist for the American men in track and field until Saturday’s …