Donald Trump says Venezuela's embattled opposition leader must be protected, as President Nicolas Maduro prepares to take the oath again after allegedly stealing an election.

Machado was released after a brief detention while leaving a protest in Caracas Thursday on the eve of President Nicolas Maduro’s inauguration.

Machado’s appearance at the rally was her first public appearance in months, since a government crackdown on Venezeulan opposition figures and their supporters last year.