MONTREAL—Tom Kim’s theatrical performance at the Presidents Cup may have worn thin with American fans. But according to Kim, it’s the U.S. side that crossed a line. Following a loss to Patrick Cantlay and Xander Schauffele on Saturday evening,

An exciting Saturday at the Presidents Cup may have gone a bit too far, at least according to Tom Kim. Following a narrow 1-down loss to Patrick Cantlay and Xander Schauffele in foursomes, Kim accused some U.