Unlike an impeachment motion that seeks to remove an office holder, debate on a censure motion involves members expressing strong opinions of disapproval against the targeted individual.
Mr Mungatana accused Mr Gachagua of behaving as a co-president instead of working as the principal assistant to President William Ruto.
The political woes facing Deputy President Rigathi Gachagua took a different turn on Monday, with Tana River Senator Danson Mungatana filing a censure motion against the number two in command.
Mr Mungatana filed the motion with Senate Speaker Amason Kingi, accusing Mr Gachagua of conducting himself in a manner that does not befit the stature of the office the DP holds.