The Obama administration and its critics on the right , such as Republican Sen. Bob Corker , contend that such sanctions will change Russian behavior , but there is not a shred of evidence to suggest this strategy would be effective . Andrew Kuchins : Jet 's downing must awaken U.S. , Europe to danger of Russia-Ukraine war . Comment: He says sanctions over Russia 's help to rebels will help Putin whip up nationalism . Kuchins : Diplomacy needed to de-escalate crisis ; Putin wo n't allow himself to lose face .
Andrew Kuchins : Jet 's downing must awaken U.S. , Europe to danger of Russia-Ukraine war . Comment: He says sanctions over Russia 's help to rebels will help Putin whip up nationalism . Kuchins : Diplomacy needed to de-escalate crisis ; Putin wo n't allow himself to lose face .