Treisman : Russia is much weaker than Ukraine , needs aid to hold its own . He says there are powerful arguments on both sides about whether to send military aid . Aid could lead to Russian escalation but doing nothing would condone Kiev 's actions , he says . Daniel Treisman : Argument for arming Kiev is stronger than it has ever been .
Daniel Treisman : Ukraine is much weaker than Russia , needs aid to hold its own . He says there are powerful arguments on both sides about whether to send military aid . Aid could lead to Russian escalation but doing nothing would condone Putin 's actions , he says . Treisman : Argument for arming Kiev is stronger than it has ever been .