US President Barack Obama has extended congratulations to rival Mitt Romney “on a spirited campaign” but said he is “confident we’ve got the votes to win”.
Mr Obama said he knows Romney supporters are “just as engaged, just as enthusiastic”.
He spoke to reporters briefly after making calls to Wisconsin campaign volunteers from a campaign office near his Chicago home.
Mr Obama said he and first lady Michelle Obama were grateful to all of the campaign volunteers who have worked hard on his behalf.
He was greeted by thunderous applause by about two dozen volunteers, many with tears streaming down their face.
During one call, he told a woman: “Hopefully we’ll have a good day.” And he told her to “keep working hard all the way through”.