File photo dated October 27, 2004 - The White House , 1600 Pensylvania avenue in Washington DC. - American voters go to the polls on Tuesday to choose their next president. US election results are sometimes declared within hours of the polls closing, but this year's tight contest could mean a longer wait. Democratic Vice-President Kamala Harris and Republican Donald Trump, the former president, have been running neck-and-neck for weeks. Photo by Olivier Douliery/ABACAPRESS.COM