America's biggest security problem is being framed as foreign powers widening the country's own political splits — bad news for anyone hoping the polarization cools off on its own.

• China and Iran top the threat list, ahead of any domestic group.
• TikTok is called China's tool for pushing Americans further apart.
• Iran's rulers, not its people, are the target of the criticism — described as a hostile theocracy.
• When Iran's internet was cut during the strikes with Israel, 15% of the world's Bitcoin mining power vanished overnight.
• The same blackout also silenced a wave of fake online accounts posing as American Christians and spreading hate toward Jews.

Outlook: Expect more pressure on foreign-run bot networks and on TikTok, with crypto mining still exposed to any new Middle East blackout.