President Obama on ‘The Tonight Show’: A good move?- Christian Science Monitor

“We tend to vote for people we think we can laugh with and not those we laugh at,” says Chris Lamb, a professor of communication at the College of Charleston in South Carolina.

http://www.csmonitor.com/USA/Elections/Vox-News/2011/1025/President-Obama-on-The-Tonight-Show-A-good-move