Poll Tracker

With the last presidential debate 36 hours away, Barack Obama has a significant post-second-debate lead over John McCain in four key states, according to today's Quinnipiac/Washington Post/Wall Street Journal poll.

In three states, Obama moved into double-digit leads after Tuesday's debate: in Minnesota, Obama leads McCain 51-40 percent, in Wisconsin it's 54-37 and in Michigan, he's ahead 54-38. McCain pulled his campaign staff out of Michigan two weeks ago. The numbers didn't change post-debate in Colorado, where Obama leads McCain 52-43 percent.

The pollsters said Obama was "boosted by the economic crisis and a strong debate performance," and noted that, for the first time, Obama "leads or ties Republican John McCain among white voters in all four states."

The telephone survey was done Oct. 8-12 and has margins of error of +/- 3 percentage points (Colorado and Michigan), +/- 3.1 (Minnesota) and +/- 2.8 (Wisconsin).

See all the rest of the most recent State-by-State General Election Polls.