Lucas leads Davis in latest poll

According to an exclusive WCPO/SurveyUSA poll, Democrat Ken Lucas would retake his old seat from incumbent Republican Geoff Davis in Kentucky's 4th Congressional District if the election were held today.
This is the question posed in poll, which was conducted from 7/22 through 7/24:
If the election were today, and you were standing in the voting booth right now, who would you vote for? Republican Geoff Davis? Democrat Ken Lucas? Or some other candidate?
41% Davis (R)
50% Lucas (D)
8% Undecided
Ken Lucas on the web