13 US Lawmakers Press Meta on Brazil Vote
BRAZIL · ELECTION
Key Facts
- —The country Brazil, Latin America’s largest democracy, holds a presidential runoff on Sunday 25 October 2026 between President Lula and Senator Flávio Bolsonaro.
- —Why it matters Meta Platforms, a US company, runs Facebook, Instagram and WhatsApp, and US lawmakers now ask whether its platforms treated the two Brazilian campaigns equally.
- —Why now The letter is dated Thursday 22 October 2026, three days before the runoff, and asks for a briefing on Friday 23 October.
- —What happened Senator Bernie Sanders and 12 House members put six questions to Mark Zuckerberg and asked for written answers by Wednesday 4 November.
- —The numbers Thirteen signers, six questions, 17 Meta measures under review, a two-hour human-review rule and a campaign estimate of 1.3 million people who missed Lula ads.
- —What it means for you US users and investors see Congress probing how a US platform handles a foreign vote, though the letter is a request, not a subpoena or a law.
- —Still open Whether Meta answers by 4 November, and whether Brazilian courts find any unequal treatment of the two campaigns.
- —Prediction markets Polymarket gives Flávio Bolsonaro about a 76% chance of winning the 25 October runoff and Lula 23.5% (23 October, 3:24 p.m. ET). Polymarket puts Flávio Bolsonaro’s chance of winning at 76% and Kalshi at 76% (Lula: 24% and 25%), as of 23 October, 3:20 pm ET; prices are bets, not polls.
- —Power Index Brazil ranks 1st of 14 in The Rio Times Latin America Power Index, with 75.0 points (October 2026 edition).
Runoff · Sunday, 25 October
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US lawmakers press Meta to explain alleged favouritism toward Flávio Bolsonaro before the Brazil election 2026 runoff on Sunday 25 October. Senator Bernie Sanders and 12 members of the House of Representatives wrote to chief executive Mark Zuckerberg on Thursday 22 October.
Readers following Brazil election polls and Brazil election odds will see why it matters, since the Brazil runoff date is Sunday 25 October. The signers want a briefing on Friday 23 October and written answers by Wednesday 4 November, after the vote.
Brazil’s electoral court has pressed Meta all week, as we covered in Meta and X Get 24 Hours to Explain Feeds. The new step comes from Washington, where the letter asks about the company’s own rules, its contacts and its data.
Why US Lawmakers Press Meta Now
The letter cites credible reports that Meta platforms restricted content tied to President Luiz Inácio Lula da Silva while amplifying content tied to Senator Flávio Bolsonaro. These are claims in a letter, not findings, and Meta has told Brazil’s electoral court that it favours no candidate.
Lula leads the left-wing Workers’ Party, while Flávio Bolsonaro, the son of former president Jair Bolsonaro, is the conservative Liberal Party candidate. Sanders is an independent senator from Vermont, and the other 12 signers sit in the House.
Representative Pramila Jayapal of Washington state, a member of the House Foreign Affairs Committee, published the letter with Sanders on Thursday 22 October. The other signers are Representatives Greg Casar, Maxwell Frost, Jesús García, Jonathan Jackson, Summer Lee, Mark Pocan, Mike Quigley, Delia Ramírez, Jan Schakowsky, Rashida Tlaib and Nydia Velázquez.
What the Letter Alleges
The letter says Lula’s Facebook advertising account was disabled without explanation on 23 September, 11 days before the first round on 4 October. It adds that the account was later restored and that Meta cited only “some activities” that broke its rules.
It says Meta stopped the Lula campaign from paying to boost Instagram posts for nearly 24 hours on 9 and 10 October. The campaign estimates that about 1.3 million people did not see its ads during that time.
The letter cites Folha de S.Paulo reporting on internal Meta messages about the restrictions and about recommendations that promoted Flávio Bolsonaro’s profile. The Folha headline quoted in the letter’s footnotes says Meta engineers spoke of technical failures.
The letter says a Brazilian digital-accountability group, CTRL+Z, released findings on 13 and 14 October documenting more than 1,000 reports of moderation restrictions during the campaign, mostly on pro-Lula accounts. It also cites a 14 October column by journalist Mônica Bergamo, which it says showed Meta’s AI agent making content for Flávio Bolsonaro but not for Lula from the same prompt.
The letter says the electoral court, known as the TSE, fined Meta on 15 October and doubled the fine on 19 October. Brazilian reports give a narrower record, in which acting judge Marco Aurélio Bellizze ordered equal treatment on 15 October with a penalty of R$500,000 (US$99,300) a day for noncompliance and raised it on 18 October to R$1 million (US$198,500) a day.
On 20 October Meta told the court it had adopted measures to comply, which the letter describes as 17 initiatives plus a human review system for presidential campaign ad accounts. Brazilian press reports say the system requires human review of automated restrictions on the two campaigns’ ad accounts within two hours until 25 October.
Six Questions for Zuckerberg
The first two questions ask how Meta instructs employees on moderation in foreign elections and whether it has dealt with Trump administration officials on Brazil. The letter asks for policies, meeting records, calls, emails, texts and letters on the Brazilian judiciary, regulation proposals, the 2026 elections and US policy toward Brazil.
Questions three and four ask Meta to confirm the Folha reporting and to say when staff first raised concerns about unequal treatment. They also ask what the 17 initiatives are, what safeguards existed before and whether Meta will assess similar steps in other countries with pending elections.
Question five asks how Meta will oversee and enforce the two-hour human-review rule for both campaigns’ ad accounts. Question six asks whether an independent auditor may see Meta’s internal moderation and distribution data on political content about the Brazilian election.
The letter asks for an immediate briefing on Friday 23 October and written answers by Wednesday 4 November. None of the sources reviewed says whether the briefing took place.
What Meta and the Court Have Said
At a hearing on Tuesday 20 October, the electoral court gave Meta 24 hours to detail how it ensures equal distribution of political content and equal handling of election ads, the TSE said. Meta denied interfering in the election or favouring any candidate and blamed the problems on technical issues.
Substitute minister Marco Aurélio Bellizze, an auxiliary judge for election propaganda in the runoff, held the hearing with Meta and both campaigns. He said transparency and equality between the candidates is what the court seeks to protect.
At an earlier hearing on 15 October, Meta told the court it was improving its AI filters and would try to block boosted campaign ads paid for in foreign currency or by supporters. None of the sources reviewed carries a Meta response to the lawmakers’ letter.
What It Means for You
For US readers, the way US lawmakers press Meta shows Congress asking how a US-based platform behaves in a foreign vote, with Brazil choosing its president on Sunday. It is a request for information, not a subpoena, a bill or a committee action, and it sets no penalty.
The questions on auditor access and on contacts with the Trump administration are the ones to watch, because they would show how much Meta is willing to disclose. Our guides Who Dominates Brazil, Elites and Regions Explained and Who Is Flávio Bolsonaro, Lula’s Runoff Rival? give the background on the candidates.
Travellers and residents in Brazil face no direct change from the letter itself. Our Brazil Geopolitics Explained 2026 guide and the city guides for São Paulo and Rio de Janeiro cover the wider context.
What Is Not Known
It is not known whether Meta held the briefing requested for Friday 23 October or will answer by 4 November. The letter sets no penalty, and no source reviewed says what the lawmakers would do after that date.
The letter repeats allegations from Brazilian reports and does not itself prove that Meta favoured either candidate. Meta denies interfering, and Judge Bellizze wrote on 15 October that there was so far no proof of deliberate manipulation of the algorithms, Correio da Manhã reported.
The electoral court decisions themselves could not be opened, so the fine amounts rest on Brazilian press reports and the dates on those reports and the letter. The Folha report and the Bergamo column the letter cites could not be opened either, so both are described as the letter describes them.
What Prediction Markets Say
On Polymarket, an online prediction market, bettors give Flávio Bolsonaro about a 76% chance of winning the 25 October runoff and Lula 23.5% (23 October, 3:24 p.m. ET). The Brazil Presidential Election event has drawn about US$192.8 million in bets, with about US$25.5 million on the Flávio contract and US$28.9 million on the Lula contract.
These prices are bets, not polls, and they do not show whether Meta treated either campaign unfairly. Live prices are on our odds page.
Prediction markets · who wins the runoff
Implied chance of winning Brazil’s presidency on 25 October, from traders’ prices.
Polymarket
Flávio Bolsonaro 76.2% · Lula 23.5% (US$193 million traded)
Kalshi (regulated in the US by the CFTC)
Flávio Bolsonaro 76% · Lula 25%
As of 23 October, 3:20 pm ET (20:20 Lisbon), updated every 20 minutes. Prices are bets, not polls, and can move fast.
Why we show this: prediction markets turn real-money bets into a live probability that moves within minutes of the news, which is why investors, campaigns and newsrooms in the United States now follow them closely. We show them next to polls and official results, never instead of them.
Why we show this: prediction markets turn real-money bets into a live probability that moves within minutes of the news, which is why investors, campaigns and newsrooms in the United States now follow them closely. We show them next to polls and official results, never instead of them.
Frequently Asked Questions
Who signed the letter to Meta about Brazil?
Senator Bernie Sanders and 12 House members signed it, and Representative Pramila Jayapal published it. It is dated Thursday 22 October 2026 and addressed to Mark Zuckerberg.
What do the US lawmakers want from Meta?
They want a briefing on Friday 23 October and written answers to six questions by Wednesday 4 November. The questions cover moderation rules, contacts with the Trump administration, the 17 measures, the two-hour review rule and auditor access.
Has Meta responded to the letter?
None of the sources reviewed carries a Meta response to the letter. Meta has told Brazil’s electoral court that it favours no candidate and blames technical issues.
Did Meta favour Flávio Bolsonaro in Brazil?
That has not been established, because the letter relays allegations from Brazilian reports and Meta denies taking sides. The electoral court has ordered equal treatment and demanded explanations.
When is Brazil’s runoff?
Brazil votes on Sunday 25 October 2026 in a runoff between President Lula and Senator Flávio Bolsonaro. Our runoff date page lists the start time and where to follow the results.
Can Congress force Meta to answer?
The letter is a request for information, and no source reviewed describes a subpoena or a committee vote. Whether Congress takes further steps after 4 November is not known.
Sources: Representative Pramila Jayapal, press release, 22 October 2026; Letter to Meta Platforms, 22 October 2026 (PDF); Superior Electoral Court (TSE), hearing with Meta, 20 October 2026; Superior Electoral Court (TSE), hearing with Meta, 15 October 2026; Correio da Manhã, 16 October 2026; Poder360, 18 October 2026; O Povo, 21 October 2026; Diário do Centro do Mundo, 23 October 2026; Banco Central do Brasil PTAX rate of R$5.0377 per US$1, 23 October 2026; elDiario.es, 22 October 2026.
This article was drafted with automated assistance and reviewed before publication. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief