In the US Presidential campaign, many voters do not have a clear idea of who John Kerry is. That is shaping the two camps' advertising campaigns at the moment. According to Taegan Goddard's Political Wire:
To attract on-the-fence voters, Kerry is expanding the use of biographical ads to introduce himself, while President Bush is running negative ads to try to define his opponent first.
(The Race To Define Kerry, May 28, 2004)
Other recent Political Wire items on advertising:
Kerry's Ads Are Working (May 27) Kerry Expands Ads (May 27)