Chavismo's undisputed leader will continue to be Chavez, dead or alive.
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But many within Chavismo have more fear than respect for the 49-year-old former soldier.
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If the president's foes have their way, Chavismo will end the same day his rule does.
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After a crushing electoral defeat, Maduro is facing pressure within the ruling party to defend Chavismo.
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None have been heavyweight leaders of the leftist "Chavismo" movement forged by his late mentor.
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The Chavismo regime, named after Chávez, has governed the country with increasing ruthlessness for the past two decades.
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The opposition believes the poll may mark the beginning of the end for the governing "Chavismo" movement.
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Two years ago, Smilde said he had little sympathy for the protesters because Chavismo had recently won an electoral mandate.
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The furious reaction highlighted Chavismo's sensitivity to even the slightest discussion of succession, which has been expunged from all official discourse.
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Late leader Hugo Chavez turned the military into a bastion of "Chavismo" after a short-lived coup against him in 2002.
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Chavismo is the movement founded by former President Hugo Chavez, who Mr Maduro succeeded following Mr Chavez's death in 2013 from cancer.
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Supporters say he is recovering but insist Chavismo would continue in its current form even beyond him, just with different men leading Chavez's vision.
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The volatile situation underscores the challenges of the "Chavismo" movement to maintain Hugo Chavez's self-styled revolution without his messianic but micro-managing leadership.
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That has turned the once theoretical debate over "Chavismo without Chavez" into a very real enigma with major political and economic repercussions.
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If elected, Maduro vows he will maintain the socialist policies of "Chavismo" in the energy-rich nation, despite rampant inflation and falling oil production.
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Opinion polls have shown Maduro as the likely winner, but Chavez's opponents said they wanted a chance to end "Chavismo" at the voting booth.