Story highlights Fox has been a harsh critic of Trump

He wasn't the only Mexican to tweet at Trump on Friday

Washington (CNN) Former Mexican President Vicente Fox is back to trolling Donald Trump on Twitter, particularly as the US President-elect has waffled on his pledge to have Mexico pay for a border wall and amid questions about Russian interference in the election.

"Sr Trump,the intelligence report is devastating. Losing election by more than 3M votes and in addition this.Are you a legitimate president?" Fox tweeted Friday night.

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

Fox's jab at Trump comes after the US intelligence community concluded in a declassified report released that Russian President Vladimir Putin ordered an "influence campaign" aimed at hurting Hillary Clinton and helping Trump.

In addition to that, Trump lost the popular vote to Clinton by 2.9 million votes -- not more than 3 million votes, as Fox said in his tweet -- which has been something of a touchy subject for Trump, who has cited his Electoral College lead to highlight his win.

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