NBC chief White House correspondent Hallie Jackson says White House staffers are terrified of being swept up in special prosecutor Robert Mueller's investigation, despite President Donald Trump's evidence-free belief he'll be exonerated in the probe.

“For people, Republicans, allies of the president — I will also tell you, mood-wise, you can’t overstate the paranoia and the concern inside the West Wing about this investigation,” Jackson said.

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Trump seems to be in a state of denial over the trajectory of the investigation that's already found his former National Security Adviser Mike Flynn pleading guilty to lying to the FBI.

“[T]he president, I’m told loves to be talking about his tax bill. He’s actually feeling pretty good about where he is right now," Jackson explained.

Watch the segment below.