(Newsroom America) -- A new NBC-WSJ poll of swing states where the presidential election could well be decided shows President Obama holding an eight point lead over Mitt Romney, which is essentially unchanged from June.
The sample of registered voters living in the swing states of Colorado, Florida, Iowa, Michigan, Nevada, New Hampshire, New Mexico, North Carolina, Ohio, Pennsylvania, Virginia and Wisconsin shows the president's lead over Romney is 49 to 41.
Overall the poll shows Obama leads Romney by six percentage points among registered voters, 49 percent to 43 percent, which is a slight change within the margin of error from last month's poll, which showed Obama ahead by three points.
Meanwhile both presidential candidates have seen their "very negative" ratings increase to all-time highs in the poll, which analysts blamed on the increasingly negative tone of the election campaign.
The poll of 1000 registered voters had a margin or error of 3.1 percent.