There are a number of reasons why it is not always possible to have all districts with exactly the same population. One reason is that the population of a state can change over time, and it may not be practical to redraw district lines every time the population changes. Another reason is that there are often natural or historical boundaries that make it difficult to draw districts with equal populations.
Despite these challenges, it is important to ensure that all districts are as equal in population as possible. This can be done by using a variety of methods, such as gerrymandering and redistricting. Gerrymandering is the practice of drawing district lines to give one political party an advantage over another. Redistricting is the process of redrawing district lines, usually done every ten years after the census.
The principle of "one man, one vote" is essential to a fair and democratic government. By ensuring that all voters have an equal say in government, we can help to ensure that our government is representative of the people.