Eugenio Javier Hernández Flores, is a Mexican politician affiliated with the Institutional Revolutionary Party (PRI). He was the mayor of Ciudad Victoria from 2001 to 2004 and Governor of the state of Tamaulipas from 2004 to 2010, and was also federal deputy in 2000 and coordinator of the Financial Committee of Tomas Yarrington during his campaign. On May 27, 2015, he was indicted on charges of money laundering alongside his brother-in-law Oscar Gomez Guerra by the United States Department of Justice (USDOJ).

Tomás Jesús Yarrington Ruvalcaba is a Mexican politician affiliated with the Institutional Revolutionary Party. He held office as the Mayor of Matamoros from 1993 to 1995, and the Governor of Tamaulipas from 1999 to 2005. Yarrington sought nomination for the presidential elections for the PRI in 2005.