"For the first time ever, the Court invalidates an agency action solely because
it questions the sincerity of the agency's otherwise adequate rationale."
"The Court's holding reflects an unprecedented departure
from our deferential review of discretionary agency decisions. And, if taken seriously as a rule of decision, this holding would transform administrative law. "
"It is not difficult for political opponents... to generate controversy with accusations of pretext, deceit, and illicit motives. Significant policy decisions are regularly criticized as products of partisan influence, interest group pressure, corruption, and animus."
"Unable to identify any legal problem with the Secretary's reasoning, the Court imputes one by concluding that
he must not be telling the truth."
"Prior census questionnaires have included questions ranging from sex, age, and race to commute, education, and radio ownership."
"And between 1820 and 2010, every decennial census questionnaire but one asked some segment of the population a question related to citizenship. The 2010 census was the first since 1840 that did not include any such question."
https://www.supremecourt.gov/opinions/18pdf/18-966_bq7c.pdf