The US State Department issued a statement under the heading "Crimea is Ukraine."
From gosdepovskogo material:
Putin repeated false claims to Ukrainian territory (...) The inhabitants of Crimea in 2014 were forced to vote under the careful supervision of Russian military personnel.
Comment of the Russian Embassy in the United States on the statement of the US Foreign Ministry (published on Facebook):
Four years ago Crimeans accepted historical decision. In a real democratic way - through a referendum - they returned themselves and their land, Sevastopol and Crimea, to Russia. They corrected historical justice, which was violated back in 1954, when they were illegally transferred to Soviet Ukraine. The State Department could not pass by this event, issued an unprecedentedly angry and biliary statement. But, as they say, "you are angry, then you are wrong."