"There is a huge dirty war ongoing. We have never had links to any foreign government. There are no links to the United States, Russia, the administration of [US President] Donald Trump, or the government of Russian President Vladimir Putin," Lopez Obrador was quoted as saying by the Reforma media outlet on Friday.
The same day, Enrique Ochoa, the leader of Mexico's ruling Institutional Revolutionary Party (IRR), argued that Lopez Obrador allegedlty received support from Venezuela and Russia.
On Monday, Russian Ambassador to Mexico Eduard Malayan called the rumors about Russia's alleged interference in the forthcoming election in the Latin American country "nonsense."
Moscow has repeatedly denied claims that it interfered in the elections of any country, calling such claims "absolutely unsubstantiated."