The Northern Senators Forum has suspended Sen. Abdullahi Adamu as it chairman.
Deputy Senate President, Ike Ekweremadu, announced the leadership change at the close of plenary on Wednesday.
Adamu was replaced with Senator Aliyu Wamakko.
Adamu criticized the senate a few days ago when the lawmakers reordered the 2019 election timetable.
He also criticized former President Olusegun Obasanjo for advising President Muhammadu Buhari not contest for second term.