The inauguration of Venezuelan President Nicolás Maduro has left his opponents grappling with conflicting feelings of hope and disappointment, pondering why the leftist leader could not be stopped despite credible evidence that he had lost the election last year.

President-elect Donald Trump says Venezuela's embattled opposition leader must be protected as President Nicolas Maduro takes the oath of office for a third six-year term.

Venezuela opposition leader María Corina Machado's aides said she was detained Thursday, followed moments later by official denials of her arrest, in a confusing episode that capped a day of protests seeking to block President Nicolás Maduro from clinging to power.