A coalition of civil rights and voting-rights organizations has sued Florida in federal court over a new law requiring voters to submit documentary proof of citizenship, arguing the measure will disenfranchise eligible voters ahead of the 2026 midterms rather than improve election integrity as state officials claim.
What the law requires
Florida Gov. Ron DeSantis signed House Bill 991 on April 1, 2026. The law directs state election officials to verify the citizenship status of voter applicants and existing registered voters by cross-checking state and federal databases, including records held by the Department of Highway Safety and Motor Vehicles. Anyone registering to vote or updating an existing registration must provide documentary proof of citizenship — a valid U.S. passport, a certified birth certificate or a naturalization certificate are the recognized options. The requirement is scheduled to take effect January 1, 2027, ahead of the following election cycle, though its rollout is already shaping registration drives for this fall’s midterms.
Who is suing and why
The lawsuit was filed in the U.S. District Court for the Southern District of Florida by the Southern Poverty Law Center and the Democracy Defenders Fund on behalf of Black Voters Matter Fund and the League of United Latin American Citizens, joined by the Florida Immigrant Coalition, Florida Rising, Common Cause and the Advancement Project. The plaintiffs argue HB 991 conflicts with the National Voter Registration Act of 1993, which they say limits the documentation states may require for registration and bars systematic voter-roll purges within 90 days of a federal election. They also raise Fourteenth Amendment due-process claims, contending that government records used to verify citizenship — particularly for naturalized citizens — are often outdated or inaccurate, risking the erroneous removal of legitimate voters.
The state’s defense
Florida officials describe HB 991 as a straightforward election-integrity measure meant to ensure only citizens vote, consistent with a broader wave of state proof-of-citizenship laws enacted over the past two years. Supporters in the Legislature have pointed to the law’s reliance on official government databases as a safeguard against errors, and DeSantis has said the requirement simply confirms what election law already assumes: that voting is limited to citizens.
A pattern beyond Florida
Florida is not acting alone. Mississippi enacted a similar voter-citizenship-check law around the same time, and proof-of-citizenship measures have become one of the most litigated categories of election law nationwide this cycle, with courts in several states weighing nearly identical claims about outdated data and NVRA conflicts. Attorneys who track this litigation say the outcomes have been inconsistent so far, with some laws blocked and others allowed to proceed while challenges continue.
The stakes for naturalized citizens
Voting-rights advocates emphasize that naturalized citizens are disproportionately at risk under database-matching systems, since government records frequently lag behind a person’s actual citizenship status — someone naturalized after a driver’s license was issued, for instance, may still show up as a noncitizen in DMV records. Plaintiffs argue this systemic lag, not fraud, is the real threat the law poses to eligible voters, particularly in a state with a large population of naturalized citizens.
What’s next
The case is in its early stages, with no ruling yet on a preliminary injunction that would delay the law’s effective date. Because HB 991 does not take full effect until January 2027, the immediate fight over the 2026 midterms centers more on collateral effects — voter confusion, registration-drive disruptions and preparatory database matching — than on outright voter removals this fall. Both sides say they expect the litigation to stretch well into 2027, with the outcome likely to influence how other states calibrate citizenship-verification requirements in future election cycles.
Timing and the midterms
Although HB 991’s core documentary-proof requirement does not take effect until January 2027, plaintiffs say the law is already shaping how county election offices and voter-registration organizations operate ahead of the November midterms, as officials prepare systems and staff training for the coming database cross-checks. Groups like Florida Rising and the Florida Immigrant Coalition say they are fielding a rising number of questions from naturalized citizens worried about whether their existing registrations could later be flagged, even though no registrations are being removed under HB 991 this fall.
Broader context
Florida’s law adds to a long list of election changes the state has made in recent cycles, including earlier voter-roll maintenance programs and tightened rules around third-party voter registration drives, several of which have themselves drawn separate litigation. Supporters of HB 991 argue this latest measure is a logical extension of that broader push to tighten registration integrity, while critics say each new layer compounds the risk that eligible voters, particularly those with limited English proficiency or without easy access to original citizenship documents, will be discouraged from registering or re-registering at all.
