I say the USA should do to Venezuela the same as JFK did to Cuba. Announce that our Monroe Doctrine is that no European or foreign power can change the balance of power in the Western Hemisphere and the USA as preeminent power here will enforce a blockade to stop such arms from entering Venezuela. We can't let Chavez do what Castro attempted to do back in the Cuban Missile Crisis.
Russia is just trying to keep its post-Soviet military industries in business.