Cristóbal Arias Solís (born 10 August 1954) is a Mexican lawyer and politician, belonging to the National Regeneration Movement (Morena).

The PRD denounced fraud on the part of the PRI government[5][6][7] and, in the midst of massive mobilizations, Governor Villaseñor resigned only 21 days after taking office.

Cristóbal Arias Solís was re-elected to represent the PRD for the government's candidacy after internal difficulties with the pre-candidate Roberto Robles Garnica who alleged fraud and challenged the process.

Under the argument that the PRD was no longer an instrument for transformation and social justice, and also ceased to be the opposition, he resigned from the party in a letter dated April 2016.

[13] In March 2018, he became a candidate for senator for the Juntos Haremos Historia alliance headed by Morena, a party founded by Andrés Manuel López Obrador.