San Diego business and political leaders sought to strengthen the economic relationship with their Mexican counterparts Monday during the Regional Chamber of Commerce‘s 19th annual cross-border trade mission. The delegation includes more than 110 people from both San Diego and Baja California, including the mayors of multiple cities and Mexican economic development specialists. … [San Diego Mayor Todd] Gloria said he views the mission as an “opportunity to advocate for trade policy that benefits our businesses, as well as to press for additional, substantive action to address the Tijuana River Valley sewage crisis.”