Washington - US President Barack Obama and Republican challenger Mitt Romney remained in a virtual tie in the latest opinion polls released on Sunday, just days before the White House election.
The survey by the Wall Street Journal and NBC News gave Obama 48% support and Romney 47% - a statistical dead heat, given the survey's margin of error of plus or minus 2.55% points.
"This poll is reflecting a very, very close campaign nationally," Republican pollster Bill McInturff, who conducted this survey with Democratic pollster Peter Hart, said in a statement.
"It's a dead heat," Hart added. "This election is going to be decided by turnout, turnout, turnout."
The poll, conducted between November 1-3, sampled 1 475 likely voters. The findings were in keeping with most national polls which find the presidential contest too close to call.
Meanwhile, a USA Today/Gallup Poll of swing states showed voters were evenly split, with 48% choosing Obama and 48% Romney.
However, a Pew survey found that Obama led 48% to 45% among likely voters who already have made up their minds, with four percent saying they remain uncommitted.
Most polls, however, give Obama a slight but significant lead in most of the crucial battleground states that ultimately will determine the outcome of the presidential election, and therefore give the Democratic incumbent favourable odds of re-election.