comment: Two days after pro-Donald Trump rioters attacked the Capitol, then-national security adviser Robert O’Brien got a call from Senate GOP Leader Mitch McConnell and an aide who asked him to look into something he’d been hearing: retired military personnel sympathetic to Donald Trump might be preparing to prevent Joe Biden’s inauguration.
  Even more notably, O’Brien said, he received a similar message in two calls with Biden’s incoming national security adviser, Jake Sullivan, who O’Brien said appeared to be conveying the sentiment of Biden himself.
  Others who reached out and urged him not to resign included Sen. Ben Sasse (R-Neb.) and former vice president Dan Quayle.
  O’Brien also described speaking with then-Vice President Mike Pence within minutes of his evacuation to a loading dock beneath the Capitol where he was sheltering amid the riot.