Venezuelan president Nicolas Maduro is expected to win a second six-year term in Sunday's election, despite a deepening crisis which has made food scarce and seen inflation soar.

More than a million Venezuelans have abandoned their country for a better life abroad in recent years as oil production in the once wealthy nation plummets.

Those who have stayed behind wait in line for hours to buy subsidised food and withdraw cash which is almost impossible to find.

While polls show Venezuelans overwhelmingly blame Mr Maduro for their mounting troubles, he is still heavily favoured to win thanks to a boycott of the election by his main rivals amid huge distrust of the nation's electoral council, which is controlled by government loyalists.

Mr Maduro ended his campaign on Thursday dancing on stage before a cheering crowd in Caracas while blaming Venezuela's increasingly dire outlook on a US-orchestrated "economic war".

"I extend my hands to all Venezuelans so that we can move forward together with love and take back our homeland," said Mr Maduro, the hand-picked successor to late President Hugo Chavez, who launched Venezuela's leftist revolution.

"I have seen the future of Venezuela and a historic victory awaits us."

On Friday, the Trump administration added Diosdado Cabello, a key Maduro ally, to a growing list of top officials targeted by financial sanctions, accusing the socialist party boss of drug trafficking and embezzlement.

Mr Maduro's main rival, independent candidate Henri Falcon, has faced the dual challenge of running against a powerful incumbent while trying to convince sceptical Venezuelans to defy the boycott called by the main opposition coalition.

Blasting Mr Maduro as the "candidate of hunger," he has campaigned on a promise to accept humanitarian aid and seek assistance from the International Monetary Fund - all proposals Mr Maduro has rejected as tantamount to surrendering to the US "empire."

"I swear that I will liberate Venezuela from this dictatorship," Mr Falcon shouted to supporters at his final campaign rally on Thursday in his home city of Barquisimeto. "I swear it in the name of God."

Also on the ballot is television evangelist Javier Bertucci, who has cut into Mr Falcon's support by providing free soup at rallies.

Around 80% of Venezuelans believe Mr Maduro has done a bad job, yet turnout is expected to be the lowest since Mr Chavez was elected in 1998, with only 34% saying they are certain they will vote, according to recent polling by Datanalisis.

The election has drawn broad criticism since some of Mr Maduro's most-popular rivals were barred from running, and several more were forced into exile.

Echoing the views of Venezuela's tattered opposition movement, the United States, European Union and many Latin American countries have already said they won't recognise the results.

In addition, pressure tactics honed in past campaigns have kicked into overdrive, further tilting the playing field in Mr Maduro's favour.

Almost 75% of households said they received government-issued food boxes in the past three months, according to Datanalisis, and Mr Maduro on the stump has promised that the 16.5 million holders of the fledgling "fatherland card" will be rewarded for their vote.

"This is neither a competitive or democratic election, and the result may not reflect the preference and decision of the voters," said Luis Vicente Leon, president of Datanalisis.

Javier Corrales, a Venezuela expert at Amherst College, said the opposition's sit-out strategy could be as disastrous as its boycott of congressional elections in 2005, which led the ruling party to sweep all seats and pass legislation removing presidential term limits that further strengthened Mr Chavez.

"The irony is that this is the least democratic election of all but it's also the best chance the opposition has ever had," said Me Corrales. "If Maduro wins by a large margin, he'll take it is as a green light to continue radicalising and moving in the direction of completely destroying the private sector."

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