Mr Ebrard may be one of the few figures who can bridge the divide.
For that reason, many PRD leaders preferred Marcelo Ebrard, the moderate mayor of Mexico City.
But provided he succeeds as mayor, Mr Ebrard may turn into a formidable rival to his former mentor.
Mexico City's Mayor Marcelo Ebrard said on Twitter that the capital's water and other essential services worked normally.
Polls show that it could lose its grip on the capital next year, when Mr Ebrard's term expires.
The ideologically amorphous PRI will swoop on the centre-left territory that Mr Ebrard would have occupied, Mr Cancino predicts.
The best hope for the party to keep the PRI out of power might well be to back Mr Ebrard.
For 12 years, Mexico City has been governed by AMLO and his successor Marcelo Ebrard, both from the leftist PRD party.
Its social conservatism has limited its appeal in cosmopolitan Mexico City, where the mayor, the PRD's Marcelo Ebrard, has legalised gay adoption.
Opponents complain that the city government spends excessively on promoting Mr Ebrard and that contracts have been doled out to his political allies.
"The measures we have taken, and above all the public's reaction, have led to an improvement, " Mexico City Mayor Marcelo Ebrard said at a news conference.
When the previous mayor of Mexico City, Marcelo Ebrard, unveiled the Azerbaijan-Mexico Park last year, he said it was a "testament to the will of the two peoples to grow closer".
Mr Ebrard also noted that - in 16 years - none of the 180 diplomatic missions or 45 international organisations based in Mexico City had given as much money for public spaces in the capital as Azerbaijan.
"For certain, this is priority No. 1 for Mexico City, not only because we have announced a reduction this weekend in the supply from Cutzamala, but also because it has to do with sustainability, " said Marcelo Ebrard, head of Mexico City's government.
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