* Chavez named Maduro as heir apparent in December
* He has continued former boss' tough line on opponents
* Mocked by opposition as a bad Chavez imitator
By Daniel Wallis
CARACAS, March 11 (Reuters) - Former bus driver and union leader Nicolas Maduro followed a simple strategy when he began filling in for cancer-stricken Venezuelan President Hugo Chavez last year: copy his boss's policies, style and radical rhetoric.
Now that Chavez is dead, Maduro appears determined to stick with the same approach as he campaigns for a presidential election scheduled for April 14.
Maduro, who formally presented his candidacy on Monday, is expected to benefit from the outpouring of emotion over Chavez and comfortably defeat opposition leader Henrique Capriles, the centrist governor of Miranda state.
A firm Chavez loyalist, Maduro has so far given no hints that he might make significant policy changes if he is elected.
Knowing he might not recover, Chavez named the burly, mustachioed Maduro as his preferred successor in December before flying to Cuba for his fourth cancer operation in 18 months.
The move made Maduro, who had served six years as foreign minister and was named vice president only a few weeks earlier, the OPEC nation's de facto leader.
He was given the red, yellow and blue presidential sash on Friday, sworn in as acting president three days after Chavez's death from cancer. That gives him another advantage in the quick election campaign ahead.
Although unable to come anywhere near to matching Chavez's charisma, the 50-year-old Maduro has copied his hectoring style, grand historical references and vitriolic attacks on "treacherous" opponents.
"I am not Chavez, in terms of his intelligence, charisma, historic strength, leadership ability and spiritual grandeur," he told supporters at the weekend.
"I'm 'Chavista,' I'm a son of Chavez."
Like Chavez, Maduro has accused foes of plotting to assassinate him and blamed private businesses for causing Venezuela's economic problems with hoarding and what he denounces as "speculative attacks" on the bolivar currency.
Hours before Chavez's death, Maduro accused "imperialist" enemies of infecting Chavez with cancer - the kind of headline-grabbing claims against powerful foes that Chavez often used to whip up supporters during his 14 years of tumultuous rule.
On Sunday, he launched a blistering attack against Capriles, calling him a Nazi and "wretched loser" for daring to accuse officials of lying to minimize Chavez's illness.
TWO DECADES BESIDE CHAVEZ
As foreign minister, Maduro had a fairly dull image as a loyalist who never diverted from Chavez's line, although some saw him as an affable potential moderate who could use his talents as a union negotiator turned globe-trotting diplomat to build bridges with critics at home and abroad.
At times he has softened his rhetoric - for example, saying that it was only a "small number" of opposition figures who were "conspiring against the fatherland" - but he has taken a tough line more often than not.
If Maduro wins the election, he is expected to broadly continue the radical policies of the Chavez era, including nationalizations, tight state control of the economy and financial support for allies such as communist-led Cuba.
There is plenty of speculation that he might at some point try to ease tensions with business groups and the U.S. government but so far there is no firm evidence.
Still, his first priority is to win the election and that means marshalling support from across Chavez's coalition, which ranges from leftist ideologues to businessmen, and military officers to hard-line armed groups called colectivos. It would be much more difficult if he openly proposed a new direction.
Opposition critics have lampooned Maduro as a poor imitation of Chavez, saying he parrots his boss's words and ideas without the same charm or independent thought. Rivals say he is trying to cash in on a wave of empathy triggered by Chavez's death.
"You have used the body of the president for political campaigning," said Capriles, who won 44 percent support when he competed against Chavez at the last election in October.
Two recent polls showed Maduro ahead of Capriles, by more than 10 percentage points, in part because of Chavez's blessing.
Within the ruling Socialist Party, Maduro faces pressure, from ideological hard-liners as well as profiteers who enriched themselves under Chavez, to extend the state's grip over the economy and private enterprise.
Other than campaigning heavily on Chavez's blessing and his position as guarantor of revolutionary continuity, it is hard to see how Maduro's own policy plans might develop.
"Maduro remains an enigma," said Alberto Barrera Tyszka, who co-wrote a 2004 biography of Chavez called "Without Uniform."
"In these early days, he has tried to imitate Chavez in style, though without his grace and charisma."
In 1992, when Chavez was jailed for a failed coup that made him famous, Maduro took to the streets to demand his release and visited him in prison.
Maduro's wife, Cilia Flores, led the legal team that helped get Chavez freed within two years, and she is also a former leader of the National Assembly. The two have long been seen as a power couple in the government.
One of Maduro's offices features a large portrait of the late Indian spiritual guru Sai Baba, whom he and Flores visited in 2005.
A rabble-rousing legislator who was on the front line of the successful effort to defeat a brief coup against Chavez in 2002, Maduro rose to head the National Assembly, swapping the blue jeans and plaid shirts of a union leader for sharp suits.
Even in his smarter attire, Maduro used to elbow through reporters to get to the appetizer table before presidential news conferences.
FRIEND OF CHINA, RUSSIA
As foreign minister, Maduro traveled widely, denouncing U.S. foreign policy and cultivating allies in emerging markets such as Russia and China, which would become a key financier.
"He has always followed Chavez unconditionally but not because he's not smart enough to do otherwise," said Vladimir Villegas, Venezuela's former ambassador to Mexico.
Alberto Vivas, a school friend of Maduro's, played baseball with the future vice president when they were teenagers, and then they worked together on the Caracas metro system. "Nicolas is very analytical and particularly intelligent," Vivas said.
Jose Albornoz, who worked alongside him as a legislator, praised his common touch.
"Nicolas is a person who can talk to anyone ... His work with unions taught him to communicate with his adversary," he said. "I think he could open a dialogue with (opposition leaders) to make sure his government is successful."
If he wins the election, Maduro will face a testing economic scenario after last month's devaluation of the bolivar currency, which followed heavy state spending ahead of Chavez's re-election last year.
Inflation is above 20 percent a year and oil production has stagnated even though Venezuela has the world's biggest reserves of crude.
The idea of a transition from Chavez to Maduro may have come from Cuba's Fidel Castro, Chavez's mentor who six years ago handed over power to his younger brother Raul after falling ill himself. The younger Castro has since begun a slow transition away from centrally planned communism.
More pragmatism from Maduro could help tackle problems like violent crime, inflation and unemployment that critics say went unchecked because of Chavez's focus on more ideological themes.
It is unclear what measures Maduro might be prepared to take if the economy took a turn for the worse.
While Chavez had a reputation for choosing top officials on the basis of loyalty and political views, people who have worked with Maduro say he looks for credentials and hard work.
"He's a real man of the people," said Ramon Torres, Ecuador's former ambassador to Venezuela.
Whatever his long-term plans, Maduro is sure to drop Chavez's name at every turn along the campaign trail, eulogizing him in gushing and quasi-messianic terms.
During the president's absence after his last surgery, Maduro peppered speeches with references to a state-backed campaign called "I am Chavez," and he once opened his shirt to show a T-shirt underneath bearing an image of his boss's eyes.
At the inauguration of one public transport project he strayed into an awkward metaphor: "Chavez is the cable car." (Additional reporting by Girish Gupta, Mario Naranjo and Brian Ellsworth; Editing by Kieran Murray and Eric Beech)