A political union is a type of agreement between different regions or countries to work together more closely. This can involve sharing laws, policies, and governance structures to create a unified political entity. An example of a political union is the European Union, where member countries collaborate on various issues like trade, security, and environmental policies. In a political union, the participating regions often give up some of their individual powers to a central authority. This helps streamline decision-making and fosters cooperation. However, it can also lead to debates about national sovereignty, as countries must balance their own interests with those of the larger group.