What will happen to the balance of slave and free states once The United States gains more territory

If there were even one more slave state or free state, the balance of power would shift in the Senate, and would likely shift in the House as well. Compromises were needed to equalize the power between proslavery and antislavery interests in the government to keep the Union together.

https://www.encyclopedia.com/humanities/applied-and-social-sciences-magazines/balance-between-free-and-slave-states-overview

Explanation:

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.

citizens get the vast majority of their political and governmental information from the media, which includes television, print journalism, radio, and now the internet. the media play an important role in connecting people to government.