US government doesn't want even dual citizens (those who have US and other citizenship) to go to Cuba using their other non US passports.
But in practice a lot of US citizens including those who do no have second citizenship travel to Cuba using US passports thru third countries. They just make sure they do not get Cuban stamp
But in practice a lot of US citizens including those who do no have second citizenship travel to Cuba using US passports thru third countries. They just make sure they do not get Cuban stamp