Answer:
President Lincoln had a very interesting stance on the issue regarding slavery. He personally opposed slavery, however favored popular sovereignty in the western territories. He likewise opposed the spread of slavery, but surprisingly was willing to tolerate it where it already existed.
Answer: Vietnam
Explanation:
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Answer: The Supremacy Clause of the Constitution of the United States (Article VI, Clause 2), establishes that the Constitution, federal laws made pursuant to it, and treaties made under its authority, constitute the "supreme Law of the Land", and thus take priority over any conflicting state laws.
Answer:
Many joined unions because of unfair labor laws.