Upon his return, Rodríguez was sworn in as president of the triumvirate on July 28, 1815, in which he presided together with José Miguel Pey de Andrade, and Antonio Villavicencio.
On October 14, authorities caught Cornelio Rodríguez, a royalist, who confessed the plans about a failed royalist coup, Cornelio Rodríguez also accused members of Congress to support the coup, and among those accused was Rodríguez.