White House trade adviser Peter Navarro said the administration is preparing to rely on Section 232 of U.S. trade law to impose tariffs on imported pharmaceuticals, framing the move as a response to a "national security crisis." The bulk of the measures would target generic drug products, Navarro told CNBC on Thursday. Navarro added that export-control actions taken by China and Russia risk constraining the United States’ access to key medical supplies, bolstering the case for protective duties. Section 232 allows the president to restrict imports deemed harmful to national security and has previously been used on steel, aluminum and, more recently, a broad range of Chinese goods.