A USA spouse visa is a type of visa that allows a foreign national to enter the United States to join their American citizen or permanent resident spouse. There are two main types of USA spouse visas: the K-1 visa for fiancés and the CR-1 visa for spouses. The K-1 visa allows a foreign national to enter the United States for 90 days to marry their American citizen fiancé, while the CR-1 visa grants a foreign national conditional permanent residency upon entry and allows them to live and work in the United States while their application for permanent residency is processed. Both types of visas require the foreign national to provide evidence of their relationship and meet certain eligibility requirements. Once approved, the foreign national can join their spouse in the United States and start their life together.