** FILE ** Then-Democratic presidential candidate, Sen. Barack Obama, D-Ill., left, talks to plumber Joe Wurzelbacher in Holland, Ohio, Sunday, Oct. 12, 2008. (AP Photo/Jae C. Hong)

** FILE ** Then-Democratic presidential candidate, Sen. Barack Obama, D-Ill., left, talks to plumber Joe Wurzelbacher in Holland, Ohio, Sunday, Oct. 12, 2008. (AP Photo/Jae C. Hong)