Firebrand Siaya Senator James Orengo insists that NASA co-principal Kalonzo Musyoka should take oath first before calling for inclusive dialogue.
Along with co-principals Moses Wetangula and Musalia Mudavadi, the trio have dismissed the decision by Raila Odinga to meet Uhuru Kenyatta.
"Kenya can only move on if everyone is brought on board. I am requesting Uhuru to also meet us," Kalonzo said.
In his various visits across the country, Raila has maintained that his historic handshake with Uhuru will unite the country.
But are a funeral in Siaya on Saturday, Orengo dismissed pressure from NASA leaders to have them sitting on same table with Uhuru and Raila.
"He (Kalonzo) must be sworn first before making demands. When Raila needed him the most, he ran away."
While Kalonzo has been pushing for a meeting with Uhuru, the latter has however remained tight lipped.
Although the content of his MoU with Uhuru remains a guarded secret, Raila is understood to have taken over as senior statesman and Kenyan chief ambassador of piece.