SurveyUSA (7/18-20, likely voters, 6/6-8 in parens):
John Yarmuth (D-inc): 53 (57)
Anne Northup (R): 43 (40)
(MoE: ±4%)
This latest poll from SUSA is awfully similar to one of Northup's internal polls from last month, showing Yarmuth leading by 51-43. Considering Northup's high name recognition, this is not a bad place for Yarmuth to start off in.