Obama: "There is no precedent that anybody can find for someone who has been charged with perjury just getting off scot-free."

In fact, Flynn was accused of one count of lying to federal agents, but he was not under oath in a legal proceeding, which a perjury charge would require.

And former President Bill Clinton faced no criminal charges despite the perjury allegation that led to his impeachment, and later acquittal, by the Senate.