Congress was given the power to ban the slave trade after 1808.
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California became a free state
The Compromise of 1850 was a direct result of the Wilmot Proviso. This was one of the main events leading up to the American Civil War.
Improved sanitation was the direct result of the discovery that germs caused disease. Hospitals changed their practices to keep diseases from being spread.
Three-Fifths Compromise
There was conflict between the least populated states and greatly populated states in terms of representation. If too much representation was given to the big states, the smaller states there would be an imbalance of power. In addition to this, there was also conflict between those who wanted slaves to count for representation power. The result of that conflict was the Three-Fifths Compromise. In many senses, the constitution was a compromise on many fronts.
The U.S. ConstitutionThough the official purpose of the Constitutional Convention was to revise the Articles of Confederation the convention culminated with the signing of a new document, the U.S. Constitution.
Each state only has 2 senators. Representatives are based on population. This is as a result of the Big state/ Small state compromise when the Constitution was drafted.
Three-Fifths Compromise
the introduction of a bill
John C. Calhoun did not support Henry Clay and Stephen Douglas' Compromise of 1850, citing the Constitution as his reason. He believed the Constitution justified slavery and any attempt to end slavery would result in dis-union and civil war.
California
The United States is a representative republic, not a direct democracy, as a result, the question is unanswerable. As for how the US became a representative republic, this was through the approval of the US Constitution of 1789, which is still in power today.