This document discusses separation of powers and constitutionalism in Nigeria based on a comparison with the US model. It argues that while Nigeria and the US both divide power among the executive, legislative, and judicial branches, neither country achieves absolute separation. The Nigerian model gives the judiciary power of judicial review over the other branches. While this allows checks on their power, critics argue judicial review gives unelected judges power over elected officials. The document examines the specific powers granted to each branch under the Nigerian constitution to demonstrate how some overlap and sharing of powers exists, showing limited rather than absolute separation. It aims to show separation and constitutionalism are complementary and inseparable concepts in both the Nigerian and US models of government.