In the 2018 federal elections, he was elected as a senator of the Republic of the first minority representing the state of San Luis Potosí. He assumed office within the LXIV Legislature on September 1, 2018. Within Congress, he is president of the third labor commission and secretary of the commission on metropolitan areas and mobility. He was secretary of the board of directors of the Senate from August 31, 2019, to August 31, 2020.[1]
On April 29, 2021, he requested leave from his position as senator and announced his resignation from the Morena party in protest of the candidacies of the " Together We Make History " coalition in the state of San Luis Potosí for the federal and state elections.[4] Dothé considered that "in many candidacies Morena no longer represents the fourth transformation."[5]
