The U.S. designated the Gulf Clan as a Foreign Terrorist Organization and as a Specially Designated Global Terrorist, saying it finances violence through cocaine trafficking after earlier Treasury actions named alleged logisticians and financiers.U.S. officials and Marco Rubio said the move will allow asset freezes, criminal penalties for material support and secondary sanctions to choke the group's finances as Colombia continues fragile talks with the organization.Colombian negotiators warned the designation could harden the group's negotiating stance and complicate demobilization as Washington expands maritime and financial operations against transnational criminal networks.