International captain Trevor Immelman and his side started the day trailing by 4-1 following Thursday's opening foursomes, and would have been hopeful of closing the gap in Saturday's fourballs, but it wasn't to be. with the Americans winning three of the matches and drawing the other two to extend their lead from three points to six.
Max Homa sank a clutch 11-foot putt for birdie at the 19th that ensured the US team finished the day with a record-tying 8-2 lead, as he and Billy Horschel narrowly defeated Corey Conners and Taylor Pendrith by 1 up.
"This is insane," Homa said. "It has come down to the 18th for me two days in a row. To have the opportunity to do it was amazing.
"It's something I'll never forget."
Earlier, two US duos, Patrick Cantlay and Xander Schauffele, and Justin Thomas and Jordan Spieth, secured victories for the second day running.
Spieth and Thomas defeated Adam Scott and Cam Davis 2&1, while Cantlay and Schauffele had a 3&2 victory over Hideki Matsuyama and Tom Kim.
The Internationals' two half points on the day came from Sungjae Im and Sebastian Munoz, who managed to tie their match against Scottie Scheffler and Sam Burns, and Mito Pereira and South Africa's Christiaan Bezuidenhout, who also managed a draw against Kevin Kisner and Cameron Young.
But the International team needs a lot more than draws to get back into this contest, which is already shaping up for another record defeat.
The Americans, who boast 10 of the world's 16 top-ranked players, are chasing a ninth consecutive victory in the competition against an International side decimated by LIV Golf withdrawals.