John McCain 50
Barack Obama 40
John McCain has significantly expanded his lead in Missouri, turning a three point lead in last month's poll into a ten point one now.
The key to McCain's rise is nearly doubling his lead among white voters. He now has a 56-35 advantage with them, up from 50-39 in July. Obama is still dominating among black voters but it's nearly impossible for him to win in Missouri without keeping his deficit with whites in single digits.
As he is in many states McCain is doing a better job of keeping voters in his party with him than Obama is. He is up 87-9 among Republicans while Obama has a smaller 78-15 lead with Democrats.
Full results here.