Lets start by defining the term correctly:
Gerrymandering, in U.S. politics, the practice of drawing the boundaries of electoral districts in a way that gives one political party an unfair advantage over its rivals (political or partisan gerrymandering) or that dilutes the voting power of members of ethnic or linguistic minority groups (racial gerrymandering). The term is derived from the name of Gov. Elbridge Gerry of Massachusetts, whose administration enacted a law in 1812 defining new state senatorial districts.
The effects are pretty clear in our country. Here you will be able to see how resizing and redrawing could change and swing the voting criteria in any district. Now this website is heavy on statistical analysis and has some pretty fancy algorithms, but if you spend enough time you may be able to understand the effects it has on the political spectrum and make some assumptions based on those famous “swing” that occur.
The general consensus is that the majority of democratic votes would be won by the metropolitan areas so that the stretching of rural (republican) areas is necessary in order to maintain or root out any bias. This it seems is what has actually helped republicans maintain more of their incumbents.
The video above gives a great explanation although a few years old the principles still apply. The reality is whether you agree or disagree with “resizing”, its not going away anytime soon. Bogging down our courts and the intricacies of the legal system make these topics, sorely entrenched in our political identity as a country, difficult to root out and correct. We have enough issues with political gerrymandering not even mentioning racial gerrymandering. That in itself is another compositional layer that fortunately has been improving but is quite clearly visible in many of the areas and districts across the larger cities. In Houston you don’t need to go far to see the segregation in Hispanic, Asian and Black neighborhoods. I will point out that communities tend to stay together, and that notion applies to social classes as much as it does to racial ones. The greatest unifier and divider of all men is and always will be money. Green has its own color and allegiance.
Do you research. Learn what’s right and truthful. There isn’t always a clear answer or one that presentes the “best” option. You will quickly discover that power is convenciene and those that hold it tend to shift things accordingly to protect themselves and their interests.