Why This Matters

• Excluding undocumented immigrants from the census count would shift House seats and Electoral College votes toward states with smaller immigrant populations, likely benefiting Republicans.
• Federal funding for healthcare, education, and infrastructure — distributed based on census data — could be redirected away from communities with large immigrant populations.
• The proposal reignites a decades-long debate over whether the census should count all residents or only citizens.

Background

The U.S. census, required every 10 years by the Constitution, determines how the 435 House seats are apportioned among states and how hundreds of billions of dollars in federal funds are allocated. The Trump administration attempted to add a citizenship question to the 2020 census, but the Supreme Court blocked it. The current proposal goes further by seeking to exclude undocumented immigrants from the apportionment base entirely, a move critics say violates the 14th Amendment's mandate to count 'the whole number of persons in each State.'

Key Perspectives

[Trump administration]: Argues that counting non-citizens for representation dilutes the political power of American citizens and that the census should reflect the voting-eligible population. [Immigrant rights groups and Democratic states]: Contend that the Constitution requires counting all residents regardless of legal status, and that exclusion would violate the principle of 'one person, one vote.' They are expected to sue. [Census experts]: Warn that the proposal could depress response rates among immigrant communities, leading to less accurate data for all purposes, not just apportionment.

What to Watch

• Legal challenges: The proposal will almost certainly be blocked in court, at least temporarily, as the 2020 citizenship question was.
• Congressional reaction: Democrats in Congress may attempt to block funding for implementation or pass legislation reaffirming the traditional method.
• Timeline: The public comment period on the proposed rule ends in 60 days; a final rule could be issued in early 2027, but litigation could delay any changes before the 2030 census.