Concerns abound on how language models can be used to manipulate, persuade and engage in one-on-one interactions with voters to influence their behavior

Justice Department says it doesn't know whereabouts of 'Kremlin asset' Andrii Derkach, a Ukrainian politician who worked with Giuliani to dig up dirt on Biden

Senior administration official assesses that the amount, spent since 2014, is just 'the tip of the iceberg,' more went undetected

US officials say goal of operation wasn't to change results of election but to sow confusion, create perception results couldn't be trusted, though Treasury says it foiled effort

Government departments say hackers 'materially impacted' security of networks, though no evidence found that they manipulated the outcome

Counterintelligence chief also says officials do not believe anyone could manipulate voting results in meaningful way

Twitter says it'll work to curb reach of 'state-affiliated media' on platform, while Facebook removes users in Romania posing as American supporters of Trump

National Counterintelligence and Security Center says Moscow and Beijing looking for ways to affect policy, while Tehran circulating disinformation, anti-American content online

Kremlin calls American allegations 'conspiracy theories,' denies that it is promoting fake news via English-language websites

Top lawmakers in party demand FBI briefing over what they say is an effort to 'launder and amplify disinformation' before November vote