US President Barack Obama holds a lead of 2 percentage points over Republican challenger Mitt Romney in Ipsos online poll results. Obama led Romney by 47 percent to 45% among likely voters, a slim margin. The poll also found that 88% of registered voters now say they will definitely vote for their candidate, leaving just 12% who say they could change their minds, 10 days before Election Day on November 6. Nearly one in five – 18% – said they had already cast their ballots. Among those, Obama led 55% to 41% for Romney. The survey was conducted October 23-27. It sampled 1,665 registered voters and 1,291 likely voters.