White House raises global tariff to 15% via Trade Act authorities as Section 301 investigations target major partners

U.S. President Donald Trump said Saturday he will raise a new global tariff to 15% from 10%, a day after the Supreme Court upheld a lower court ruling blocking his use of the 1977 International Emergency Economic Powers Act (IEEPA) to justify sweeping duties, including “reciprocal” tariffs on South Korea and other trading partners. In a social media post, Trump criticized the decision and said the increase would take effect immediately.

Hours after Friday’s ruling, Trump signed a proclamation imposing a temporary 10% global tariff under Section 122 of the 1974 Trade Act, effective 12:01 a.m. Tuesday Washington time. U.S. Trade Representative Jamieson Greer also announced plans to initiate investigations under Section 301 of the same act, which allows the administration to impose tariffs or other import restrictions to address foreign trade practices. Greer said the probes are expected to cover “most major trading partners: and areas including industrial overcapacity, forced labor and discrimination against U.S. technology firms.

U.S. President Donald Trump said Saturday he will raise a new global tariff to 15% from 10%, a day after the Supreme Court upheld a lower court ruling blocking his use of the 1977 International Emergency Economic Powers Act (IEEPA) to justify sweeping duties, including “reciprocal” tariffs on South Korea and other trading partners. In a social media post, Trump criticized the decision and said the increase would take effect immediately.

Hours after Friday’s ruling, Trump signed a proclamation imposing a temporary 10% global tariff under Section 122 of the 1974 Trade Act, effective 12:01 a.m. Tuesday Washington time. U.S. Trade Representative Jamieson Greer also announced plans to initiate investigations under Section 301 of the same act, which allows the administration to impose tariffs or other import restrictions to address foreign trade practices. Greer said the probes are expected to cover “most major trading partners: and areas including industrial overcapacity, forced labor and discrimination against U.S. technology firms.

Get your
KoreaPro
subscription today!

Unlock article access by becoming a KOREA PRO member today!

Unlock your access
to all our features.

Standard Annual plan includes:

• Receive full archive access, full suite of newsletter products

• Month in Review via email and the KOREA PRO website

• Exclusive invites and priority access to member events

• One year of access to NK News and NK News podcast

There are three plans available:
Lite, Standard and
Premium.

Explore which would be
the best one for you.

Explore membership options

© Korea Risk Group. All rights reserved.
No part of this content may be reproduced, distributed, or used for
commercial purposes without prior written permission from Korea Risk
Group.