In a letter from the Party of National Unity (PNU), Munya noted that after numerous consultations it was agreed that the best decision was to support President Kenyatta.
"After thorough consultations with our party members, elders, and supporters across the country it has been agreed that in the very best interest of the country we support the re-election of President Uhuru Kenyatta," the letter read in part.
Munya and his team called on all their supporters to campaign for President Kenyatta's re-election.
The move to ditch NASA comes barely a week after Munya joined the opposition alliance and vowed to campaign for Opposition Leader Raila Odinga.
The ex-Meru Governor joined NASA last week on Monday after claiming that he had been robbed in the August 8 elections.
"When the election of Raila Odinga and Kalonzo Musyoka was being stolen I was also canon fodder in that fight and therefore, I cannot join those who stole my election and be working for them.
"That is why I have decided today, and we have decided with the team and the people of Meru who supported me that we will be on this side of history and to continue fighting for change and transformation of this country," Munya stated.
NASA has now lost 2 political heavyweights in a span of 4 days after former Bomet Governor Isaac Ruto also decamped to President Kenyatta’s team.