On what basis did the court rule that Scott was not a citizen

Louis court on the grounds that their residence in a free territory had freed them from the bonds of slavery. Scott's case reached the U.S. Supreme Court, which ruled that he was not entitled to his freedom and, more broadly, that African Americans were not U.S. citizens. Read more about Dred Scott.

Explanation:

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Supreme Court ruling

On March 6, 1857, Chief Justice Roger B. ... Taney ruled that: Any person of African descent, whether slave or free, is not a citizen of the United States, according to the Constitution.

a change of venue is the legal term for moving a trial to a new location. a change of venue request because venue is improper means that the removing defendant believes that the case may not be in that venue because it is improper under procedural rules.

the soviet union wanted to impose communist governments in eastern europe.