From the Document: "Section 232 allows the President to impose import restrictions based on an investigation and affirmative determination by the Department of Commerce (Commerce) that certain imports threaten to impair the national security. After conducting eight Section 232 investigations, President Trump acted five times, twice imposing tariffs, declining to act on a sixth finding; another investigation found no threat, and one was terminated. President Biden is addressing the Section 232 tariffs placed by President Trump and has initiated a new investigation. Actions under Section 232 have generated debate in Congress and at the multilateral level in the World Trade Organization (WTO). Some in Congress support legislative options to amend the congressional delegation of authority."
CRS In Focus, IF10667
Congressional Research Service: https://crsreports.congress.gov/