In a situation like this one, FBI vetting would involve running peoples’ names through databases and watchlists maintained by the bureau to see if anything alarming comes up. That could include involvement in prior investigations or terrorism-related concerns, said David Gomez, a former FBI national security supervisor in Seattle.
Insider threats have been a persistent law enforcement priority in the years after the Sept. 11, 2001, attacks. But in most cases, the threats are from homegrown insurgents radicalized by al-Qaida, the Islamic State group or similar groups. In contrast, the threats against Biden’s inauguration have been fueled by supporters of President Donald Trump, far-right militants, white supremacists and other radical groups. Many believe Trump’s baseless accusations that the election was stolen from him, a claim that has been refuted by many courts, the Justice Department and Republican officials in key battleground states.