text:  This is NewsHour. The 16-year jail term handed to American journalist Evan Gershkovich by a Russian court this week on espionage charges demonstrates how the boundary between the political and the judicial has eroded in the quarter century of Vladimir Putin's dominance. It's even more obvious in Russia's treatment of its own citizens. Vitaly Shevchenko, BBC Monitoring's Russia editor, has been telling me the ways in which the law has been adapted to suit the interests of the state in curtailing critical debates.