Here, let me give you a concrete example. The most populous State in the country is California California has 39,510,000 citizens. It has a total of 53 Congressional districts. Wyoming is the least populous state with a hair under 579,000 citizens. It has one Congressional district.
Go back and read the Constitution. There never was a cap and representation was supposed to grow with the population. In fact, under the rules of the Constitution there would be thousands of Congressional districts not just 435. Population was supposed to be represented.
To get back to a fairer system I propose that we eliminate the cap and make each district equal the population size of the least populous state. That would mean 579,000 citizens in Wyoming would have the same representation as 579,000 citizens in California. As it stands today 579,000 citizens in Wyoming equals 745,471 citizens in California. California should have 68 districts. This not only makes a difference in Congress, it impacts the Electoral College.
It's worse than that as that 579,000 citizens of Wyoming get two Senators. The Dems can't do anything about the Senators since that is in the Constitution but an act of Congress can change the way districting works.