Constitutional government means

A constitutional government seeks to limit and regulate the exercise of political power by the government. Constitutional government is by definition limited government. It means government is conducted according to rules and principles, which are binding on all political actors.

Therefore constitutional government helps to constrain the unfettered exercise of power by separating or dividing it. The constitutional government provides a framework in which the government can be both responsible and representative managing conflicts, Protecting the rights, promoting participation, and maintaining the security of the citizens.