The United States have regained the Ryder Cup with a record 19-9 victory at Whistling Straits in Wisconsin.
Open champion Collin Morikawa claimed the winning half point in the fifth of Sunday's 12 singles matches as the home side reached the 14½ points they needed.
Rory McIlroy and Ian Poulter, who kept up his record of never losing in the singles, were in tears despite winning their matches as they showed the emotion of what will be a chastening defeat for Europe.
Around them, American players and fans celebrated, with Brooks Koepka downing a beer thrown to him from the crowd after he completed a 2&1 victory on the 17th green.
There had already been big wins for Patrick Cantlay, Scottie Scheffler and Bryson DeChambeau amid a carnival atmosphere by Lake Michigan, while Dustin Johnson became the first American to win all five matches at a Ryder Cup since 1979.
"This is a special day for everyone here involved," said US captain Steve Stricker. "The Ryder Cup means a lot to everybody, your side and our side. We finally put in a dominant performance.
"These guys played great, they deserve it, they were fired up to be here and it showed."
Europe captain Harrington conceded: "It's a tough loss, but they were better than us. They were a strong team and played on their best form. They had momentum the whole time."
The margin of victory eclipses the 18½-9½ successes enjoyed by Europe in 2004 and 2006 and America's own triumph in 1981.
This was a thoroughly deserved win, built on a dominant opening two days for the hosts.
They led 6-2 after Friday's foursomes and fourballs sessions, and extended that to a record 11-5 on Saturday to leave themselves needing to win just 3½ points out of the 12 available in the singles.
Harrington spoke on Saturday evening of using the spirit of 2012, when the visitors came from 10-6 down to win the 'Miracle of Medinah', to inspire his side.
He put McIlroy, who had lost all three of his matches, out first and the Northern Irishman immediately put European blue on the scoreboard by winning the first hole against Olympic champion Schaufffele.
And when Harrington's fellow Irishman Shane Lowry went ahead on the second in the second match, the few European fans at Whistling Straits this week, started to believe.
However, Cantlay, who won the PGA Tour's season-long FedEx Cup and its $15m prize earlier this month, won the next four holes to take control of that match.
Behind him, Scheffler birdied the first four holes as he put world number one Jon Rahm under early pressure.
And then the big-hitting DeChambeau hit his tee shot on the par-four first onto the green and holed the 40-foot eagle putt to stun Sergio Garcia.
They were leads the Americans would keep throughout their matches against the Spaniards, who had combined for three points from three matches in Friday and Saturday's fourballs and foursomes.
"Unfortunately they were a little better than we were," said Garcia who extended his points record to 28½ at his 10th Ryder Cup.
"We've got to accept that and we've got to get ready for Rome and try to get it back."
The victory was clinched with seven matches still out on the course, underlining the sheer superiority of the home side.
This may now be the start of quite a Ryder Cup dynasty for the US, who had lost seven of the previous nine editions of the biennial contest.
More to follow.
