Venezuela on Saturday released six U.S. citizens and one U.S. legal resident, who Washington said had been wrongfully detained in the South American country, as part of a major prisoner exchange that also saw the U.S. free two relatives of Venezuelan leader Nicolás Maduro who were convicted of drug trafficking. President Biden celebrated the release of the U.S. citizens, some of whom had been jailed since 2017, saying it was his administration’s priority to prevent Americans from being held hostage abroad.