Whether at least one respondent had Article III standing to challenge the citizenship question.
Holding
Yes. Several respondent States showed a concrete, imminent, traceable, and redressable risk of losing population-based federal funds.
Reasoning
The District Court found that adding the question was likely to reduce responses from noncitizen households, leading to an undercount. The Supreme Court held that this factual finding was not clearly erroneous for standing purposes.
Several States showed that an undercount of noncitizen households as small as 2 percent would reduce federal funding allocated by state population. That prospective financial injury was concrete and imminent, and a favorable judgment would redress it.
The causal chain did not rest on impermissible speculation about independent third parties. The anticipated reaction of noncitizens to a citizenship question was a predictable effect of government action, supported by historical response patterns and Census Bureau evidence, even if some households would fail to respond despite a legal duty to do so.