Lula wins fourth term as Brazil's president, narrowly beating Bolsonaro's son

Fact-check index: 78/100 — The article's core claims about Lula's reelection win over Flávio Bolsonaro are properly attributed to CNN and BBC, but secondary framing claims about halting a US-backed right-wing wave and regional leaders' calls for integration rely on single-source headline attribution without independent verification.

• Lula won reelection as Brazil's president for a fourth term, narrowly defeating Flávio Bolsonaro in a runoff vote — Matches CNN headline ('How Lula beat Bolsonaro... in 20 days') and BBC headline/description ('narrowly beating right-wing Flávio Bolsonaro in a knife-edge vote'), both cited.
• Flávio Bolsonaro is the son of former president Jair Bolsonaro — This relational detail is not stated in any of the provided source headlines/snippets; plausible given known context but not established by the given material.
• The win halts a wave of US-backed right-wing victories across Latin America aligning regional governments with Trump — CNN headline says the win 'halted the right-wing wave aligning Latin America with Trump,' supporting the halting/aligning claim, but the source snippet doesn't specify the wave was 'US-backed'—that framing is added.
• Latin American leaders celebrated Lula's reelection and called for deeper regional integration — Directly matches the Demócrata headline: 'Latin American leaders celebrate Lula's reelection and demand greater regional integration,' cited.