TAIPEI (Taiwan News) — The KMT and TPP are urging the government not to ratify the Taiwan-US Agreement on Reciprocal Trade, citing a US Supreme Court decision striking down President Donald Trump’s broad global tariffs imposed under the 1977 International Emergency Economic Powers Act.

TPP Chairman Huang Kuo-chang (黃國昌) said that because Trump’s reciprocal tariffs — which he described as the foundation of the agreement — were ruled unconstitutional, the pact should be revised before being sent to the Legislative Yuan, per Liberty Times. He urged the government to renegotiate with the US.

KMT Legislator Weng Hsiao-ling (翁曉玲) echoed Huang’s position, calling on the ruling DPP to examine what she described as the legality of the agreement to safeguard national interests, per NOWNews. She said the Supreme Court ruling serves as a legal safeguard for Taiwan, providing justification and room to maneuver in future trade negotiations with the US.

Former Vice Premier Shih Chun-chi (施俊吉), who served under former President Tsai Ing-wen (蔡英文), also weighed in following the court’s decision, per UDN. Shih noted that he had opposed concluding the agreement on Jan. 13, questioning the government’s push for a deal while the legality of Trump’s tariffs remained uncertain.

Shih previously argued that if Trump lost his case, Taiwan could see its tariffs reduced by 20% at no cost and the leverage of Section 232 of the Trade Act of 1974 weakened.

The opposition’s assessment was not shared by Chung-Hua Institution for Economic Research President Lien Hsien-ming (連賢明), who said renegotiation would be the worst-case scenario, per Newtalk. Lien said that while the reciprocal trade agreement is affected by the ruling, a related memorandum of understanding still protects Taiwanese products subject to Section 232 measures.

Lien added that a potential Section 301 investigation poses a greater risk to Taiwan.

DPP Legislator Lin Chu-yin (林楚茵) warned against boycotting the trade agreement and the memorandum, per Newtalk. She said the memorandum provides Taiwan with greater stability amid uncertainty stemming from Trump’s new tariff policies.