US president Donald Trump arrived to watch the Ryder Cup amid a partisan atmosphere on day one at Bethpage Black.
Air Force One flew over the course just outside New York at approximately 11:00 local time (16:00 BST) and landed at a nearby airport.
Trump, an avid golfer and fan, arrived on the course 45 minutes later where he waved to the crowds, with some supporters chanting his name along with “U-S-A” while a number of others booed.
The president left shortly before 2:30pm local time (19:30 BST).
The high-security visit required the presence of about 500 law enforcement officers and ended with “no incidents”, New York State Police told BBC Sport.
“Our goal was clearly to avoid any threats, but to achieve that by deterring any potential threat with our presence,” Major Stephen Udice, the incident commander for the Ryder Cup, said.
The recent killing of American conservative activist Charlie Kirk has increased the risk of the Ryder Cup being targeted by someone wanting to “make a statement”, Udice said earlier this week.
Security had been substantially increased for Trump’s visit, with the US Secret Service, CIA and FBI joining the New York State Police in a cross-agency operation.
SWAT teams – including snipers, bomb disposal units and canine units – joined police officers from several local Long Island forces.
Earlier this month the US Open men’s tennis final was delayed by 30 minutes because of extra security measures put in place for a visit by the president.
