Orange Democratic Movement leader Raila Odinga has admitted that he was aware of MPs controversial trip to Nashville, Tennessee.
At least 85 legislators are reportedly in the US for a conference, even with resistance from the assembly leadership that the figure is exaggerated.
In a statement on Wednesday, Raila who bashed the Parliamentary leadership, said that organisers had reached to him over the trip which has caused controversy.
"This afternoon, the National Assembly, in a rare show of unity and characteristic defensive show of anger, disowned the Nation story, threatened the media house and demanded an apology.
"The information that the Daily Nation published is in the hands of several people, locally and abroad, who out of pain for our country, felt the need to put it out if that can help stop the culture of waste and living large at the expense of tax payers that has become the mode in our legislatures. I am one of those with whom this information was shared by a section of the very organisers of the conference," said Odinga.
The former Prime Minister also accused the MPs of intimidating the media, arguing that they are constitutionally assigned as watchdogs on behalf of the public.
On Wednesday, MPs accused media of insincerity, adding that the forth estate is keen to set the public against them despite the fact that they are using the resources to do something 'meaningful'.
"It is misuse of power for the National Assembly to assume that it is beyond scrutiny and even worse for the institution to pretend that it can intimidate the media into abandoning the watchdog role that it is constitutionally assigned to play," he added.
Information about the trip remained a top secret even though Parliamentary Service Commission team had travelled a week earlier to the US in preparation for the conference.