Donald Trump was just one of many headliners who sat down with Chris Matthews in this wild year of politics. The Hardball Roundtable looks back at the best moments this year.Dec. 31, 2015
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Russia's mercenary Wagner Group sanctioned by U.S.
05:21
Blinken condemns rise in violence between Israel and Palestinians
01:56
Teen Palestinian gunman wounds two people in east Jerusalem
02:49
How the Auschwitz Jewish Center honors the past
07:25
'It's as real as it gets': Second Gentleman marks Holocaust Remembrance Day
09:10
'A hard day for Jews around the world': Jewish leader on Holocaust Remembrance Day