Below are links to the CSMS which themselves contain links or lists of HTS codes impacted:

Steel: https://content.govdelivery.com/bulletins/gd/USDHSCBP-3ee1cba?wgt_ref=USDHSCBP_WIDGET_2

Aluminum: https://content.govdelivery.com/bulletins/gd/USDHSCBP-3ee1ce7?wgt_ref=USDHSCBP_WIDGET_2

Automobiles: https://content.govdelivery.com/bulletins/gd/USDHSCBP-3da18a1?wgt_ref=USDHSCBP_WIDGET_2

Auto Parts: https://content.govdelivery.com/bulletins/gd/USDHSCBP-3de7ef9?wgt_ref=USDHSCBP_WIDGET_2

Cooper (no CSMS, but the proclamation includes an HTS list): https://www.whitehouse.gov/presidential-actions/2025/07/adjusting-imports-of-copper-into-the-united-states/

Timber/Lumber: https://content.govdelivery.com/bulletins/gd/USDHSCBP-3f69699?wgt_ref=USDHSCBP_WIDGET_2
Increase delayed until Sept 2026: https://www.whitehouse.gov/fact-sheets/2025/12/fact-sheet-president-donald-j-trump-adjusts-imports-of-timber-lumber-and-their-derivative-products-into-the-united-states/

Medium/Heavy Duty Trucks and Parts: https://content.govdelivery.com/bulletins/gd/USDHSCBP-3f93b75?wgt_ref=USDHSCBP_WIDGET_2

Semiconductors and Semiconductor Manufacturing Equipment:
EO: https://www.whitehouse.gov/presidential-actions/2026/01/adjusting-imports-of-semiconductors-semiconductor-manufacturing-equipment-and-their-derivative-products-into-the-united-states/
Annex: https://www.whitehouse.gov/wp-content/uploads/2026/01/2026SemiConductor.prc_.rel-ANNEX.pdf

Critical Minerals and Derivative Products: https://www.whitehouse.gov/presidential-actions/2026/01/adjusting-imports-of-processed-critical-minerals-and-their-derivative-products-into-the-united-states/

INVESTIGATIONS UNDERWAY:
Pharmaceuticals and Pharmaceutical Ingredients: https://www.federalregister.gov/documents/2025/04/16/2025-06587/notice-of-request-for-public-comments-on-section-232-national-security-investigation-of-imports-of

Commercial Aircraft and Jet Engines and Parts for Commercial Aircraft and Jet Engines: https://www.federalregister.gov/documents/2025/05/13/2025-08500/notice-of-request-for-public-comments-on-section-232-national-security-investigation-of-imports-of