Far-left groups mobilizing across Europe are a wake-up call for US, expert warns

Political commentator Joe Sweeny discusses the mobilization of far-left groups across Europe following riots in Paris. He warns about the potential implications for the U.S. as police arrest over 100 protesters.

Political commentator Joe Sweeny discusses the mobilization of far-left groups across Europe following riots in Paris. He warns about the potential implications for the U.S. as police arrest over 100 protesters. Citadel CEO Ken Griffin warns that the European riots serve as a major wake-up call.