Negative ad proves more effective for Obama August 7, 2012 Attacking Mitt Romney appears to be a better advertising strategy for President Obama than stressing his own accomplishments, data from the Vanderbilt/YouGov Ad Rating Project continues to suggest. [cont.] Vanderbilt U. Share:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)MoreClick to print (Opens in new window)