TODAY: Russian diplomats leave U.S. as Putin vows not to retaliate, wishes Obama Happy New Year, Trump takes to Twitter to praise the move; Putin congratulates Russians on a year of progress; anti-racism NGO listed as ‘foreign agent’; Russian hacking code found on Vermont company computer; U.S. Special Ops training in Baltics against Russia ‘threat’; OPEC deal seals bumper gains for oil in 2016.