ANSWER: <u>The Dred Scott v. Sandford Case</u>, decided on March 6, 1857.
Answer:
There are many such contributions, but one of the greatest ones was by Nikola Tesla, a serbian immigrant who brought the AC (Alternating Current) uprising to America, despite the efforts of many reputed scientists.
Explanation:
Nikola Tesla provided many examples as to how Alternating Current was superior to DC (Direct Current), as in reduced physical contact, greater efficiency, and a wider range of applications.
The war in the middle east raises immigration,the president bringing in refugees, and equality in the U.S.