One month to come up with procedural excuses, more "newly discovered uncounted ballots", to gin up examples of minorities that were discouraged from voting, and to plan the the upcoming revolution. By then, Obrador will have convinced his supporters to lay their lives on the line,(because they will have to, literally) and to forever believe that the election was "stolen", ala Al Gore, despite any number of facts and figures that dismiss that conclusion as a lie. Will he also get the support of the narco-terrorist drug gangs that rule some of the border states? Maybe even members of the military? It is going to get hot, south of the border, this summer.
If Obrador tries to manage a coup by using mobs to take over government buildings and public areas, he won't have the support of most of the country. The north of Mexico is where all the wealth is, and they will never stand for it. Obrador is overflowing with self-importance, but the Mexican establishment pulls the strings there.
But it could get nasty.