Federal Reserve Chairwoman Janet Yellen testifies for the first time. Republicans have taken control of the White House and both houses of Congress. She will speak to the Senate Banking Committee. National Security Adviser Mike Flynn has turned in his resignation. His late night resignation comes after a day in which he was under pressure for a conversation he had with the Russian Ambassador to the United States. He may have given incomplete information about the substance of that phone call when asked about it by the White House. The nation now has a new Treasury Secretary. Steve Mnuchin was confirmed by the Senate last night. The former Goldman Sachs banker will be in oversee President Trump's changes to trade and taxes. The NFIB Small Business Optimism Index continues its post election surge.