Not a single one of the assassinated was running for president, that poster was only right in that the cartels were targeting people for political reasons on the local/mayoral level.
Their purpose was to push their anti-leftist agenda by repeating the false narrative that Mexican drug cartels murdered every other presidential candidate save one...their favored candidate...this Jewish leftist scientist woman. SeveralAnts wasn't stating anything in good faith.
Were you expecting people to actually read the article and realize you are making up unrelated conclusions, or did you think people would blindly upvote because Reuters.