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's President Nicolas Maduro, whose nearly 12 years in office have been marked by a deep economic and social crisis, was sworn in for his third term on Friday, remaining in power despite a six-month-long dispute over a contested July election and international calls for him to stand aside.

It is not viable for Venezuelan opposition leader Edmundo Gonzalez to enter the country, his ally Maria Corina Machado said on Friday, shortly after President Nicolas Maduro was sworn in for a third term despite months of controversy over the country's contested July election.

Venezuelan strongman Nicolás Maduro began a third term as president on Friday, cementing his increasingly authoritarian rule.

Maduro and his aides have always rejected sanctions by the U.S. and others, saying they are illegitimate measures that amount to an "economic war" designed to cripple Venezuela. H