Theresa May calls it the biggest-ever expulsion Russian intelligence operatives. More than 100 diplomats are being sent home from two dozen nations, with talk of scaled-down participation in this summer''s World Cup. Our guests today discuss the pros and cons of expelling diplomats, and the effects of this backlash on international diplomacy.

Out in the Cold: Mass Expulsions of Russian Diplomats Over Spy Poisoning

Theresa May calls it the biggest-ever expulsion Russian intelligence operatives. More than 100 diplomats are being sent home from two dozen nations, with talk of scaled-down participation in this summer''s World Cup. Our guests today discuss the pros and cons of expelling diplomats, and the effects of this backlash on international diplomacy.