 Complete the following phrase:  As relations with Cuba slowly and steadily improved, a foreign policy that enacted a migration intervention to begin a 7-year program of passages called the Mariel boatlift, which was perceived to aid Cuba at ridding itself of undesirables, was met with little public support. After stages of these initial trips, Vice President Walter Mondale of the Carter administration served to justify this political position by stating there is no better proof of the failure of Castros 