No the Congress can not nullify a ruling of the Supreme Court. The Congress would have to rewrite the law which the Supreme Court had declared unconstitutional. Then the new law could overrule the Supreme Court IF the new law was declared constitutional if/when appealed.
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It explained that congressional districts needed to be determined in a way that is fair for everyone.
Congressional districts must have nearly the same number of residents. This can't be exact because districts are reapportioned after the census every ten years.
If the US Supreme Court agrees with the lower court ruling, the decision is "affirmed," and becomes legally final (res judicata).
the ruling of state supreme courts are always the final judgment on a matter.
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