Wark: The West gets tough on Russia. What's next?

Canada has now joined an international effort to punish the Russians for their role in the use of a nerve agent to poison a former Russian spy, Sergei Skripal, and his daughter, Yulia, in Salisbury, England.
Global Affairs Minister Chrystia Freeland issued a statement on Monday, indicating that four Russian diplomats would be declared persona non grata for intelligence activities and that another three diplomatic positions would be denied to Russia.
This action was being taken, she said, in soli