The Muhambwe by-elections were held following the untimely death of Atashasta Justus Nditiye the then member of parliament for Muhambwe Constituency. The Buhigwe Constituent by-election were conducted following the appointment of its then member of parliament Hon. Philip Isdori Mpango as the Country Vice president to replace the former vice president who have since assumed presidency following the untimely death of former President John Pombe Magufuli and therefore ceasing to be a member of parliament pursuant to Article 71(1)(f) of the Tanzania Constitution.