"Considering how deeply synonymous the two-party system and American politics have become, it's almost impossible to imagine having alternatives at the voting booth. However, American voters weren't always limited to the Republican and Democratic parties; in the 19th Century, the American political system was comprised of multiple parties that encompassed a wide range of beliefs and ideologies and enjoyed various levels of success and notoriety."
Being able to have legitimate 3rd parties would make gerrymandering much less of an issue. There was a time that a new party could form, and be a contender on the national level. Slowly we have lost this.