The United States, turning the Presidents Cup into a runaway, won the first two matches on Saturday against an increasingly desperate International team.
Nick Price's Internationals went into Saturday's eight matches -- four morning foursomes and four afternoon fourballs -- trailing by six points and in search of a miracle comeback.
But the writing appeared to be on the wall when Australian Marc Leishman splashed the Internationals' first tee shot of the day into the water off the first tee.
Although Leishman and Jason Day had rallied to lead Jordan Spieth and Patrick Reed 1-up through eight holes it was the Americans who emerged with a 4 & 3 victory.
After squaring the match at the ninth, Spieth and Reed won the 12th, 13th, 14th and 15th to close out the match.
World number one Dustin Johnson and veteran Matt Kuchar beat Australian Adam Scott and Canadian Adam Hadwin 4 & 3 to take the US lead to 10-2.
The Americans were 1-up in the third match of the morning with the fourth all-square -- with each team having led in both.
Will the shake up in pairings give the International Team a spark? pic.twitter.com/7rY4gzcFA1
With their unprecedented six-point lead after two days, the Americans went into Saturday's eight matches more than halfway to the 15.5 points they need to lift the trophy.
Mathematically, they could even wrap up a 10th triumph in the biennial match play showdown and make Sunday's 12 singles matches moot.
Price had vowed his players wouldn't lie down, but they didn't appear to have the firepower to rebound against a US team that has combined for 17 US PGA Tour titles this season, including the three most recent major championships.