Senators McCain and Obama are each spending sizable sums of money on TV advertising during the Olympics.  But when it comes to placing display advertising online, both candidates have relatively unimpressive records, Mediaweek Senior Editor Mike Shields noted Monday in a column.

“The 2008 race has been lametastic when it comes to online advertising,” Shields wrote, adding: “McCain’s been nearly invisible when it comes to display advertising.”

Senator McCain placed 16 million online display ad impressions in June, while Sen. Obama ran 80 million impressions, Shields noted, citing Nielsen Online data.