Whakakiia te rerenga e whai ake nei: Ko Mike Gravel te kaitono nui tuatahi ki te whakarewa i to raatau kaitono i te Paenga-whāwhā 2006. Heoi anō, i te nuinga o te wā, kāore i tino tīmata te whakataetae mō te kōwhiringa perehitini o te tau 2008 tae noa ki muri i ngā pōtitanga takawaenga o 2006. I waenganui i Whiringa-a-rangi 2006 me Hui-tanguru 2007, e waru nga kaitono nui i whakatuwhera i a raatau kaupapa: Joe Biden, Hillary Clinton, Chris Dodd, John Edwards, Dennis Kucinich,
Ko Barack Obama, ko Bill Richardson, ko Tom Vilsack. Ko nga kaitono pea ko John Kerry, Al Gore, Russ Feingold, Evan Bayh, Tom Daschle, Wesley Clark, Sam Nunn, Mark Warner, me Al Sharpton i whakaarohia te rere engari i te mutunga ka whakakahore ki te rapu i te tohu. I wehe atu a Vilsack i te Hui-tanguru 2007.