Cristina Tzintzún Ramirez first helped organize the near-historic candidacy of Beto O'Rourke in Texas, who almost broke through the Democrat's statewide drought. Now, Ramirez is running to unseat Sen. John Cornyn with similar tactics: registering new voters and being unapologetically progressive. She talked to Cheddar Politics about her candidacy, strategy, and challenges about taking on Cornyn.