No evidence linking illegal immigration to measles outbreak, despite Byron Donalds' comment
Donalds attributed measles outbreaks to illegal immigration, a claim PolitiFact rated false.

SOURCE CHECK
TAP FOR WHYCredibility rates NBC 6 South Florida, where this article appeared. The other scores rate the article itself.
The reporting is attributed to PolitiFact, an established fact-checking newsroom, and presents named expert sources and its basis for rating the claim. The page does not provide additional detail about corrections practices or editorial standards.
- Source type — The article is identified as PolitiFact reporting, a specialized fact-checking source.
- Author attribution — A named author and PolitiFact are credited.
- Transparency — The article explains its ruling and identifies the evidence and experts behind it.
The article gives Donalds’ statement and the campaign’s lack of response, cites multiple named infectious-disease experts, and provides contextual evidence about vaccination and outbreak origins. Its account is detailed, though the article does not present a substantive defense of Donalds’ claim.
HOW WE SCORE ↗The article quotes and contextualizes Donalds’ claim, notes that his campaign did not respond to a request for support, and presents several experts’ explanations and relevant outbreak evidence. The claim receives less evidentiary support than the rebuttal, consistent with the article’s fact-check focus.
- Source diversity — Several named experts and outbreak-related sources contribute evidence.
- Counterarguments presented — Donalds’ claim is quoted and his campaign was asked for supporting information, though it did not respond.
- Omitted context — The article provides substantial context on vaccination and outbreak origins, but no supporting evidence for Donalds’ explanation is presented.
The article uses a fact-check format, presents Donalds’ claim, and explains the evidence it says contradicts that claim. Its critical conclusion follows the reported evidence rather than a discernible partisan framing.
- Language tone — The language is predominantly factual and attributes claims to speakers and experts.
- Framing — The story is framed as a check of a specific factual claim and explains the basis for its rating.
- Source selection — The article relies on named public-health experts and describes the campaign’s nonresponse.
Cites Politifact
This article cites Politifact as its original publisher. ChamberLight has not verified that it is a republication, so the scores are NBC 6 South Florida's own.
20 stories · 82–84 · updated Oct 1, 2026
This is Politifact's own score. The Source Check scores are for NBC 6 South Florida and this article.
PolitiFact found no evidence that illegal immigration caused the measles outbreaks Byron Donalds cited, and rated his claim false. Experts attributed the outbreaks primarily to declining vaccination rates and spread among unvaccinated people.
Florida Republican gubernatorial nominee and U.S. Representative Byron Donalds said illegal immigration under the Biden administration caused measles outbreaks, citing cases in El Paso and southwest Florida. PolitiFact reported that Donalds’ campaign did not provide evidence when asked to support the claim.
Experts told PolitiFact that declining MMR vaccination rates are the primary driver of outbreaks. The CDC does not report infected people’s immigration status, and the article says available data do not point to immigrants who entered the country illegally as the cause of any outbreak.
Community verdict
12 VOTESPeople in this story
SWIPE →Florida Republican gubernatorial nominee and U.S. representative whose claim is fact-checked
Former president whose administration Donalds referenced
Part of a bigger story
4 OUTLETSOutlets agree Donalds connected measles outbreaks to illegal immigration. Left-leaning outlets criticize his attribution and his suggestion that childhood vaccinations be spread out. Center outlets assess the claim as unsupported, citing declining vaccination coverage as a driver of outbreaks. Right-leaning outlets focus on his exchange with Molly Jong-Fast on Bill Maher’s show and back Donalds’ position.
- ARTICLES
- 4
- OUTLETS
- 4
- AVG CRED
- 55
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