Mr Kiunjuri said on Sunday that he was short-changed despite agreeing to fold up his Grand National Unity (GNU) party and support Mr Kenyatta's re-election bid.
The ex-CS also spoke of a "selective witch-hunt" by President Kenyatta’s administration, for highlighting issues that need to be addressed in Central region.
Mr Kiunjuri noted, however, that he will continue supporting the President in rolling out development projects at the grassroots.
Former Agriculture Cabinet Secretary Mwangi Kiunjuri has accused President Uhuru Kenyatta of kicking him out of the Cabinet despite his support for Jubilee Party in the run-up to the 2017 General Election.
Mr Kiunjuri said on Sunday that he was short-changed despite agreeing to fold up his Grand National Unity (GNU) party and support Mr Kenyatta's re-election bid.