The United States have a commanding lead in the 39th Ryder Cup taking the second session of foursomes 3-1 for an overall lead of 8-4.
It could have been even worse for the Europeans as at one stage they appeared to be heading for a humiliating clean sweep against them before Ian Poulter and Justin Rose hit back to grab a point.
Davis Love's men opened the second day's play with a good lead of 5-3 after Friday' two opening sessions and with Tiger Woods benched for the first time in his Ryder Cup career.
Once again it was the red-hot pairing of nine-cap veteran Phil Mickelson and rookie Keegan Bradley who led the charge, beating the top European pair of Luke Donald and Lee Westwood by 7 and 6.
That equalled the highest 18-hole winning margin in Ryder Cup history and was the first time that such a drubbing had been handed out since 1991.