Both Presidents have referred to the country of the United States as the "empire" that seeks to attack and destroy the system of government of Venezuela and its socialist plan.
In view of all permanent attacks and the obvious discomfort of both governments of Venezuela to the United States, the most fair to both countries is to limit the entries to the United States, of all Active government officials or who have been part of the either governments (Chavez and Maduro) for over a year and their immediate family including.
They should consider that if they have spent years accusing the U.S. of alleged conspiracy and attacks on Venezuela, then no point that this government officials, visit the United States, not much less to seek Political Asylum.