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.

The Nicolas Maduro regime arrested Venezuelan opposition leader María Corina Machado on Thursday after opening fire against the driver of the motorcycle in which she was riding, people close to her team said.