What is decennial reapportionment?

Decennial reapportionment is the process of redistributing congressional seats among the states based on the results of the decennial census, which occurs every ten years in the United States. This process adjusts the number of representatives each state has in the House of Representatives, reflecting population changes and ensuring that representation is proportional to the population. The goal is to ensure fair representation, as states with growing populations gain seats, while those with declining populations may lose them.