This statement applies to a democratic form of government.
The statement "leader often shares power with other parts of government" can apply to various forms of government, but it is typically associated with a system of government known as "a mixed or hybrid form of government." This form of government combines elements of both autocracy (where one person holds absolute power) and democracy (where power is shared amongst multiple entities or branches of government). In a mixed government, the leader or rulers may share power with other branches, such as a legislature or judiciary, giving them a more balanced distribution of authority.
