A group of citizens sent the US White House a petition to support a referendum for Catalan independence. This is the kind response of the White House:
"Thank you for your petition regarding the people of Catalonia. The
United States recognizes the unique culture and traditions of the
Catalan region, but considers the status of Catalonia to be an internal
Spanish matter. We are confident that the Government and the people of
Spain will resolve this issue in accordance with their laws and
Time to face reality and try something else (and better, like federalism).