Former champion Wyndham Clark takes four-shot lead at US Open

Former US Open champion Wyndham Clark has taken a four-shot lead at the US Open golf championship. Rory McIlroy is among a group of players at one under par, though his position was hampered by back-to-back bogeys on his final two holes of the round. Clark's strong performance puts him in a commanding position heading into the later stages of the tournament.