On March 1, the 66-year-old became France's first postwar president to be sentenced to prison when he was given a three-year term, two years of which were suspended, for corruption and influence peddling.

He did not attend the opening of his latest trial in Paris on Wednesday but his 13 co-accused were all in attendance, including the deputy manager of Sarkozy's 2012 campaign, Jerome Lavrilleux.

Judges later suspended hearings at the trial until May 20 at Lavrilleux's request because his lawyer has been hospitalised with Covid-19, meaning the hearings will now last until June 22.

The case is one of several to have dogged Sarkozy since he left office.

He has denied any wrongdoing, saying he is the victim of a vindictive judicial system with which he locked horns while in power between 2007 and 2012.

The divisive right-winger is accused of overspending on his failed 2012 re-election bid to the tune of 20 million euros ($24 million).

Sarkozy's campaign poured millions into huge US-style rallies as the incumbent scrambled to fend off an unexpectedly strong challenge from his Socialist rival Francois Hollande.

Prosecutors say accountants had warned Sarkozy that the campaign was set to blow the 22.5 million euro ($26.7 million) cap on spending between the first and second rounds of voting, but that he insisted on holding more events.

Investigators say his total spending on the second round came to nearly 43 million euros ($51 million).

The PR firm behind the campaign, Bygmalion, and officials in Sarkozy's UMP party (since renamed Les Republicains) are accused of conspiring to have the UMP foot the bill through a system of fake invoices to hide the over spending.

Sarkozy says he was unaware of the fraud -- unlike some of the defendants he is not charged with fraud, but with the lesser offence of illegal campaign financing. 

If convicted, Sarkozy risks up a sentence of up to a year in prison and a fine of 3,750 euros.

Brice Hortefeux, a former minister under Sarkozy, defended his ex-boss, saying Wednesday his campaign "had not cost the taxpayer a penny" because the state refused to reimburse him.

A "Sarkothon" organised by the UMP in 2013 raised 11 million euros towards his costs.

Lavrilleux and Bygmalion executives have acknowledged the system of fake invoices.

Lavrilleux made headlines in 2014 after he tearfully confessed to the scam during a French TV interview, saying: "This campaign was a runaway train that no one had the courage to stop."

On March 1, Sarkozy was found guilty of forming a "corruption pact" with his lawyer to convince a judge to share information about yet another investigation into the politician's affairs, relating to his winning 2007 campaign.

His prison sentence stunned the political establishment and prompted his many admirers on the right, including Interior Minister Gerald Darmanin, to send him messages of support.

However he is not expected to serve actual jail time, with two of the three years suspended by the court and the remaining year set to be served at home with an electronic bracelet.

Sarkozy has appealed the verdict which effectively crushed any hopes that he could stage another presidential comeback after a first failed attempt in 2016.

In a television interview on March 3, he repeated that he had "turned the page" on his political career but made clear he would continue to make his views known and anoint right-wing favourites.

Sarkozy is married to former singer and model Carla Bruni, with whom he has a nine-year-old daughter.

He has also been charged over allegations he received millions of euros from the late Libyan dictator Moamer Kadhafi for his 2007 election campaign.

And in January, prosecutors opened a probe into alleged influence-peddling involving his activities as a consultant in Russia.

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