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 : The central question now confronting President Barack Obama and colleagues is whether to supply Kiev with heavy arms . Argument for arming Kiev is stronger than it has ever been .
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 .