All three claims check out — the U.S., Israel, and Argentina did vote against Ghana's resolution designating transatlantic slavery as the gravest crime against humanity, which passed 123-3 with 52 abstentions on March 25. The headline is factually accurate but frames it as a U.S. rejection in isolation; the broader context is that this is one of the strongest UN acknowledgments of slavery as a crime, with 123 countries supporting it, and the U.S. objection centers on concerns about "ranking" atrocities rather than a blanket denial that slavery was a grave wrong.