Democrat Barack Obama's lead over Republican rival John McCain has grown to 12 points in the U.S. presidential race, with crucial independent and women voters increasingly moving to his side, according to a Reuters/C-SPAN/Zogby poll released on Thursday.
With less than two weeks before the November 4 election, Obama leads McCain 52 percent to 40 percent among likely voters in the latest three-day tracking poll, which had a margin of error of 2.9 points.
Obama has made steady gains over the last four days and has tripled his lead on McCain in the past week of polling.
"Obama's expansion is really across the board," pollster John Zogby said. "It seems to be among almost every demographic group."
The Illinois senator saw his lead among women -- who are expected to play a decisive role in this election -- increase to 18 points from 16 points on Wednesday.
And independent voters, who have been the target of intense campaign efforts by both sides, have now swung behind Obama by a 30-point margin, 59 percent to 29 percent.
Zogby said McCain, 72, appeared to have lost the traction he won after the third and final presidential debate last week.
"McCain can still try to turn it around, but he has to find focus," Zogby said, adding that economic issues, which dominated the campaign amid turmoil in the credit, housing and financial markets, still seem to be working in Obama's favor.