Herman Cain, a conservative radio host and former business executive, has officially entered the 2012 presidential campaign.

You can watch Cain's "Presidential Announcement" video below:

[youtube]http://www.youtube.com/watch?v=EHomZF3JGBg&feature=player_embedded[/youtube]

Gallup reports that of all the announced and potential Republican candidates Gallup tracks that have name recognition below 50%, only Cain creates strong enthusiasm among those who recognize him.