The uprising has not managed to turn the military, which has continued to prop up Maduro, who is also supported by China, Russia and Cuba. But unbridled inflation, rampant shortages and crumbling infrastructure make daily life miserable for the masses.
The US and about 50 other nations take the position that Maduro's re-election last year was irrevocably marred by fraud and he is not the legitimate president of Venezuela, a once prosperous nation that has the world's largest proven oil reserves.
Venezuela plunged into a deep political crisis in January, when Guaido invoked the constitution to assume an interim presidency, arguing Maduro's 2018 re-election was illegitimate. He has been recognized by most Latin American and Western countries as Venezuela's rightful leader.
The political crisis escalated significantly Thursday when the chief of staff, Roberto Marrero, a lawyer and confidant of Guaidó, was taken from his apartment in southern Caracas around dawn to an unknown destination by armed intelligence officers,
The US is calling for a vote on a UN resolution urging "the peaceful restoration of democracy" in Venezuela, free and fair presidential elections, and unhindered delivery of humanitarian aid to all people in need.