The United States has sanctioned a son of Mexican drug lord Joaquin “El Chapo” Guzman, three members of the Sinaloa cartel and two Mexican-based firms, alleging they trafficked fentanyl and other drugs into the U.S. Tuesday's sanctions came the day Mexican President Andrés Manuel López Obrador was talking with President Joe Biden about immigration and the fentanyl crisis. The Treasury Department designated El Chapo’s son and others for financial sanctions, including a freeze on American-owned assets and bank accounts and a ban on Americans doing business with them. A Culiacan, Mexico, chemical and lab equipment company and a real estate business also were sanctioned.