Why can foreign and domestic policy decisions not be considered in isolation from each other?

Foreign and domestic policy decisions are interconnected because a country's international standing and actions can significantly impact its internal affairs, and vice versa. For instance, economic sanctions or trade agreements can influence domestic economic conditions, while internal stability can affect a nation's foreign relations. Additionally, public opinion on foreign policy can shape domestic political agendas, highlighting the need for a cohesive approach that considers both realms together. This interdependence ensures that policies are more effective and responsive to the complexities of global and national dynamics.