Mezue ahịrịokwu na-esonụ: Richardson bụ onye na-aga ime ntuliaka Democratic maka ntuliaka onye isi ala nke 2008 mana ọ kwụsịrị na Jenụwarị 10, 2008 mgbe ọ na-egosi ihe ngosi na mbụ mbụ na asọmpi caucus. N'agbanyeghi ogologo oge ya na ọbụbụenyi ya na ezinụlọ Clinton, Richardson kwadoro
Barack Obama maka ntuliaka Democratic na Machị 21, 2008, kama Hillary Clinton. Onye na-ekwu okwu na onye otu Clinton bụ James Carville jiri Richardson tụnyere Judas Iskarịọt maka njem ahụ. Richardson zaghachiri n'otu isiokwu dị na "Washington Post", na-enwe mmetụta nke ịbụ onye "a manyere ịgbachitere [onwe ya] megide igbu ọchụ na ebubo na-enweghị isi".