Barack Obama 48
John McCain 44
Barack Obama maintains the same four point lead he showed in PPP's July poll of Colorado.
The key for Obama is that he has held McCain to a one or two point lead among white voters in each of the polls. If he is able to do that in November he will take the state easily because of his dominance with the state's Hispanic voters, with whom he leads 51-36.
Colorado is not a state where Obama is having more trouble holding Democratic voters in the fold than McCain is with Republicans. They each get 84-85% of their party's own support, with Obama holding a 50-35 advantage with independents.
Obama has the edge with every age group except senior citizens.
Full results here.