The Ukraine crisis provides another instance where Obama’s restraint proved costly. By failing to support Ukraine's fight against Russia, the Obama administration squandered the West’s opportunity to deter Moscow from future aggression. A Clinton administration, however, would have provided Ukraine with lethal weapons at the onset of the crisis. This would have prevented Russia from aiding separatist rebels in Crimea and could have made Putin think twice before intervening in Syria. Furthermore, her administration would not only raise the cost of Russian aggression and restore conventional deterrence in Europe, it would give the Ukrainian government a more complete set of tools that could help restore the country’s freedom from Moscow.