Wyndham Clark surged to a six-stroke lead after Saturday's third round of the US Open at Shinnecock Hills, putting him on the brink of capturing America's national championship for a second time in four years.

Clark saw his four-shot advantage halved on the first hole but responded with a gritty even-par 70, the kind of survival golf that finally matched the course's bruising reputation. His lead, which fluctuated during the round, now stands as the tournament's largest margin heading into Sunday.

World No. 1 Scottie Scheffler sits alone in second place after shooting a one-under 69. Rory McIlroy's challenge faded, leaving Scheffler as the closest pursuer — though he will need an extraordinary final round to catch Clark.

The lead shrank, then grew, and now all but swallows the tournament whole, according to observers. Clark's command of Shinnecock Hills has been the defining story of the week, as the 2023 champion seeks to double his major tally.

If Clark holds on Sunday, he would become the first repeat US Open winner since Brooks Koepka in 2017-18, though golf's unpredictable final rounds leave the door slightly ajar.