Mr Fox also questioned the legitimacy of Trump's presidency
Vicente Fox, former President of Mexico, has hit out at Donald Trump's claims that he will follow through on his promise to build a border wall.
The wall, which was one of the central tenets of Trump's election campaign, was the subject of a Trump tweet earlier this week when the President-elect reiterated his assertion that the "Great Wall" would be built, and that Mexico would pay for it.
In his original tweet, he said that the wall would be built and paid for, before deleting that message and clarifying in a later tweet to add that the money would be given by Mexico to the United States "later".
The dishonest media does not report that any money spent on building the Great Wall (for sake of speed), will be paid back by Mexico later!— Donald J. Trump (@realDonaldTrump) January 6, 2017
On Friday, Mr. Fox took to Twitter to once again claim that Mexico would not be paying for the wall despite Trump's claims.
Dubbing it a "racist monument," Fox said that Trump should be clear with US tax payers that "they will pay for it," and not the Mexican government.
Trump may ask whoever he wants, but still neither myself nor Mexico are going to pay for his racist monument.— Vicente Fox Quesada (@VicenteFoxQue) January 6, 2017
Another promise he can't keep.
TRUMP, when will you understand that I am not paying for that fucken wall. Be clear with US tax payers. They will pay for it.— Vicente Fox Quesada (@VicenteFoxQue) January 6, 2017
In the wake of the report from the United States intelligence community which highlighted the role of Vladimir Putin in ordering a campaign to influence the presidential election, Mr. Fox also went on to question the legitimacy of Trump's election.
The report found that the Russian leader and his government "aspired to help" Donald Trump's chances of winning the campaign by discrediting his rival Hillary Clinton, which Fox described as "devastating," asking "are you a legitimate president?".
Sr Trump,the intelligence report is devastating.Losing election by more than 3M votes and in addition this.Are you a legitimate president?— Vicente Fox Quesada (@VicenteFoxQue) January 6, 2017
This is not the first time that Fox and Trump have clashed over the wall, after the pair traded insults back in February.
Speaking on US television network Fusion, Mr Fox took aim at the pledge to build a wall along the US border, saying: "I am not going to pay for that f****** wall, he should pay for it. He's got the money".
Mr Fox went on to call Mr Trump "crazy" and "egocentric" during his interview with presenter Jorge Ramos.
In response, Trump turned to his Twitter account to slam the language used, which Mr Fox repeated in Friday's attack on the President-elect.
"He must apologize!" Trump tweeted. "If I did that there would be a uproar!".
FMR PRES of Mexico, Vicente Fox horribly used the F word when discussing the wall. He must apologize! If I did that there would be a uproar!— Donald J. Trump (@realDonaldTrump) February 25, 2016