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Conor McGregor is taking matters into his own hands in his quest to become Ireland's next president -- launching a petition to land on the ballot without nominations from other politicians.

Notorious went live with the campaign minutes ago ... penning a letter to the citizens of Ireland and the Irish diaspora. Getty

"I, Conor McGregor hereby declare my intention to seek the esteemed office of President of Ireland," the UFC superstar said Monday. "The current constitutional framework however presents a significant barrier to democratic participation."

McGregor -- who has been outspoken on his political beliefs in recent years -- explained in order to be considered a candidate, he must have nominations from 20 members of the Oireachtas or four county councils ... and he ap

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