 Where does Mexico's president-elect Claudia Sheinbaum stand on working with the U.S. on this? Claudia Sheinbaum has been active in trying to reassure the U.S. that she's going to be a better partner than President López Obrador. To remind the listeners, President López Obrador, the outgoing president, categorically denied that fentanyl was even a problem in Mexico. He denied that it was produced there. He denied that Mexicans were consuming it. And he regularly slapped down his own officials who were more honest and forthright about the fentanyl crisis.