He says there is room for Ukraine to be a friend of both the West and of Russia.
Russian President Vladimir Putin has sent Russia forces into the Crimean region of Ukraine, saying he needs to protect Russian interests there.
Obama also says Putin must be guided by a different set of lawyers making different determinations about his actions. Obama says there is a strong belief around the world that Russia's actions are violating international law and that force should not t be used to exert influence inside Ukraine.