Just two weeks ago, former White House National Security Advisor Susan Rice told PBS she "knew nothing" about the unmasking of Americans, specifically Trump campaign officials or transition team members.

"I know nothing about this. I was surprised to see reports from Chairman Nunes on that count today," Rice said.

Turns out, she knew all about it. After a bombshell report released Monday alleged Rice is the Obama official responsible for the unmasking of a number of Trump transition team members, her story has changed. She's gone from "knowing nothing," to unmasking being part of her job.

"We only do it to protect the American people and to do our jobs." Rice said, adding Obama officials never used intelligence to spy on Trump officials for political purposes. "I leaked nothing to nobody and never have and never would."

When asked whether she would be willing to testify under oath in front of Congress about her actions, Rice refused to give a direct answer.

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Over to you, Andrew McCarthy: