Detailed text transcripts for TV channel - CNN - 20120102:05:39:00
>> reporter: and more recently, senator barack obama staged a caucus upset that catapulted him to the front of the pack. recall that senator hillary clinton was considered all but a shoo-in until then. >> hi. this is michele bachmann calling. >> reporter: what the iowa caucuses are good at is winnowing down the field. >> who comes in second, who comes in third as well as who comes in first. if somebody else does surprisingly well, it could well launch their campaign. it's happened before. >> reporter: political upstarts have a chance here, because caucusgoers really do, as they say, kick the t...