A plurality occurs when an option receives more votes than any other option, but not necessarily a majority (which would require more than half). Given this definition, let's analyze each scenario:
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370 of 435 members of Congress support a bill.
- This is a majority (over half), not just a plurality.
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51 of 100 senators support a judicial nominee.
- This is a majority (over half), not just a plurality.
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9 of 9 Supreme Court justices support a decision.
- This is unanimous support, not just a plurality.
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1,550 of the Democrat Party's 4,765 delegates prefer a candidate.
- This is not a majority; thus, it can be considered a plurality since it is more than any other single candidate group, but without additional context on other candidates, it's ambiguous.
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205 of 538 members of the Electoral College vote for a president.
- This is not a majority and would be considered a plurality if there were multiple candidates competing for votes.
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2,472 of 2,472 Republican delegates support an incumbent candidate.
- This is unanimous support, not just a plurality.
Given the analysis, the examples of a plurality could be:
- 1,550 of the Democrat Party's 4,765 delegates prefer a candidate.
- 205 of 538 members of the Electoral College vote for a president.
So, the correct answers are those two options.