Pedzisa mutsara unotevera: Mukwikwidzi mukuru wokutanga kuzvisarudzira aiva Mike Gravel muna April 2006. Zvisinei, nokuda kwechikamu chikuru, nhangemutange yekusarudzwa kwemutungamiri wenyika muna 2008 haina kutanga zvechokwadi kusvikira mushure mekusarudzwa kwepakati pemakore muna 2006. Pakati paNovember 2006 naFebruary 2007, vamiriri vakuru vasere vakazarura mishandirapamwe yavo: Joe Biden, Hillary Clinton, Chris Dodd, John Edwards, Dennis Kucinich,
Barack Obama, Bill Richardson, uye Tom Vilsack. Vakakwanisa kukwikwidza John Kerry, Al Gore, Russ Feingold, Evan Bayh, Tom Daschle, Wesley Clark, Sam Nunn, Mark Warner, naAl Sharpton vanonzi vakafunga kumhanya asi pakupedzisira vakaramba kutsvaka kusarudzwa. Vilsack akasiya chikoro muna February 2007.