The FBI warned Twitter during “weekly” meetings before the 2020 election to expect “hack-and-leak operations’’ by “state actors” involving Hunter Biden, and “likely” in October, according to a sworn declaration by Twitter’s former head of site integrity, Yoel Roth. The warnings were so specific that Twitter immediately censored The Post’s scoop about Hunter Biden’s laptop on Oct. 14, 2020, citing its “hacked materials” policy, a move described on Saturday as “election interference” by Twitter’s new owner, Elon Musk. The extraordinary revelation for the first time lays bare how the FBI was involved in pre-bunking the story of the laptop, which...