Washington is increasingly focused on Venezuela, where a power struggle rages between embattled President Nicolas Maduro and opposition leader Juan Guaido, who is recognized by more than 50 nations, including the U.S., as interim president. VOA's Michael Bowman reports U.S. officials believe Maduro's days are numbered but are downplaying the possibility of U.S. military intervention in oil-rich Venezuela, where economic collapse has triggered hunger, privation and mass migration