The Kansas-Nebraska act allowed the people to vote if wanted to allow slavery in those states and this act served to appeal the Missouri Compromise. The Missouri Compromise prohibited slavery in the north. This act was also said to be a failure because it was made to end the conflict over slavery, but resulted in Kansas becoming a "battleground over slavery."
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It bankrupted the Soviet Union. The US private sector was able to develop the new technology and created new products and industries.
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Congress has the legal power to determine whether a law is constitutional.
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