Donald Trump has been linked to Mafia chieftain Anthony 'Fat Tony' Salerno again in a new investigative report.

The real estate mogul and GOP front-runner employed mob-run construction firms to build his Trump Tower and Trump Plaza buildings, according to a piece by Pulitzer Prize-winning reporter David Cay Johnston in Politico.

And it was Trump's business deal with these firms that led to 'Fat Tony', then head of the Genovese crime family, being convicted of racketeering, Johnston writes.

It is not the first time Trump has been tied to Fat Tony.

But this report is the most extensive account of the documents, anecdotes and investigations that connect the two.

'Links': Donald Trump (left) has been tied to Mafia boss Anthony 'Fat Tony' Salerno (right) again. The latest report lays bare federal indictments, FBI subpoenas, business records and anecdotes connecting the pair

History: Trump Tower was built by S & A Concrete, a firm run by Genovese crime family boss Fat Tony. The building on the corner of 5th Avenue and East 56th Street is pictured mid-production in 1981

Instead of using the industry standard, steel, Trump built his glittering apartment block with ready-mix concrete.

According to legal papers and experts quoted in the piece, Trump shelled out 'inflated' payments to Fat Tony's concrete firm to get them to use the quicker more problematic method - while assuring the unions would not kick up a fuss.

The entire business deal was conducted by Trump's close confidante, the lawyer Rob Cohn - who also represented Fat Tony.

Trump insists he has no recollection of such a deal and claims he has no connection to the mafia.

Johnston writes that when he asked Trump for a comment, the presumptive GOP nominee said: 'If I don't like what you write, I'll sue you.'

The lengthy, deeply investigated article digs out Fat Tony's indictment papers and records of Trump's building work in the 1980s.

Fat Tony was indicted and convicted in 1988.

It emerged he controlled a firm called S & A Concrete - as well as the highly-influential unions connected to it.

WHO WAS MAFIA BOSS FAT TONY? Mobster: Anthony 'Fat Tony' Salerno after being charged in the Mafia Commission Trial of 1985 The New York Mafia was known as the Five Families, consisting of the Genovese, Gambino, Bonanno, Columbo, and Lucchese families. Anthony 'Fat Tony' Salerno was the front boss of the Genovese family from 1981 until his arrest in 1985 and conviction in 1986. Having acted as under boss, he was appointed head of the family after front boss Frank Tierni died. It was widely known, however, that Vincente Gigante was the de facto head, operating in secret. Salerno was convicted in the far-reached Mafia Commission Trial, which dealt a near-fatal blow to the crime unit in 1985. He was sentenced to 70 years in jail, and died of a stroke in 1992. Advertisement

His indictment says he was running S & A Concretes when the firm received 'inflated' payments to build Trump Tower using speedy but problem-prone ready-mix concrete, which Johnston notes 'leaves developers vulnerable to the unions'.

'Even a brief labor slowdown can turn into an expensive disaster,' Johnston writes.

He continues: 'But with Cohn as his lawyer, Trump apparently had no reason to personally fear Salerno or Castellano—at least, not once he agreed to pay inflated concrete prices. What Trump appeared to receive in return was union peace. That meant the project would never face costly construction or delivery delays.'

Tying the deal to Fat Tony, Johnston references the mob boss' indictment.

He writes: 'The indictment on which Salerno was convicted in 1988 and sent to prison, where he died, listed the nearly $8 million contract for concrete at Trump Plaza, an East Side high-rise apartment building, as one of the acts establishing that S &A was part of a racketeering enterprise.'

Johnston's lengthy piece also ties Trump to a Gambino-linked Teamsters official John Cody.

He writes that an unemployed woman bought three apartments in Trump Tower without papers - shortly after the FBI said Cody had been getting free properties from developers.

Trump was interviewed by federal agents about Cody but denied any ties, Johnston writes.

The article also quotes Trump bragging that he got the feds to fast-track his background check when he was building his Atlantic City casino.

He claimed it was because he had no business history to investigate - something the Politico article disputes.

Decades later, as the real estate mogul runs for president, he has brushed off reports citing his dealings with the mob.

The Daily Mail, ABC, CNN and the Washington Post are just a few of the news outlets that have presented investigations tying Trump to the Mafia.

When he was still in the race, Senator Ted Cruz cited these reports, calling on Trump to publish his taxes.

He told Meet The Press he expected the media would find a 'bombshell' in the mogul's taxes.

'There have been multiple media reports about Donald's business dealings with the mob,' Cruz told host Chuck Todd.

'Maybe his taxes show those business dealings are a lot more extensive then has been reported.'

Todd called Cruz's claim 'openly speculative' and asked him to back it up with facts.

The Texas senator was unfazed, pointing to news reports that linked Trump to the mob, including the use of the company S&A Construction, which was owned by jailed mobster 'Fat Tony' Salerno.

'ABC, CNN, multiple news reports have reported about his dealings with, for example, S&A construction, which was owned by "Fat Tony" Salerno, who is a mobster who is in jail.'

'It is owned by two of the major New York crime families. And that has been reported in multiple media outlets.'

The media accounts, including one from CNN, suggest that Trump 'took the relationship [with the mob] several steps further than he had to,' said one source.

Claims: Instead of using the industry standard, Trump built Trump Tower with ready-mix concrete. According to legal papers quoted in the new Politico article, Trump shelled out 'inflated' payments to Fat Tony's concrete firm to get them to use the quicker more problematic method - and assure the unions would not kick up a fuss

High flyer: The article quotes Trump bragging that he got the feds to fast-track his background check when he was building his Atlantic City casino . He claimed it was because he had no business history to investigate. The Politico article suggests Trump in fact had ties to the mob in his records. He is pictured in Trump Tower in 1989

CNN also noted that Trump Plaza condos in Manhattan were primarily constructed using concrete, an industry that is controlled by the mafia, instead of steel.

ABC reported in December that Trump claimed in a legal deposition he did not know real estate developer Felix Sater, who has documented mafia connections, according to the New York Post.

This was despite the fact that Trump had tapped Sater for a business development role that came with the title of senior advisor to Donald Trump, according to the Associated Press.

Sater received Trump Organization business cards and was given an office within the Trump Organization's headquarters, on the same floor as Trump's own.

Trump referred questions about Sater to his staff and said he was 'not familiar with him'.