Raila Odinga's NASA coalition has termed United States envoy Robert Godec and his British counterpart Nic Hailey as 'worst exports' to Kenya.
For weeks now, Raila has been leading attack against the West by accusing it of illegally endorsing President Uhuru Kenyatta's regime.
"They should mind their own business because we are a sovereign nation. We don't need lectures from them on our internal issues," he said on Sunday.
Godec has been leading a group of envoys in reaching Raila to drop his 'hard' stand of Jubilee administration to pave way for national dialogue.
Through NASA chief executive Norman Magaya, Raila insists that he will not take part in dialogue presided over by the two.
"NASA will not be party to dialogue presided over by the two. They are the worst exports to Kenya and stands for nothing," Magaya wrote.
For dialogue to take place, America maintains, Odinga and his NASA coalition ought to recognise Uhuru as the duly elected president.