The United States has opened investigations into imports of medical equipment such as surgical masks, and industrial machinery, in moves that could lead to new tariffs.

The probes were launched September 2, according to Federal Register filings on Wednesday afternoon, and could further widen the list of industries that President Donald Trump could hit with fresh duties.

The Commerce Department is now seeking public comment on both matters.

The investigations are taking place under Section 232 of the Trade Expansion Act of 1962, the same authority that Trump has used to slap steep tariffs on imports of steel, aluminum and automobiles recently.

The process typically takes months to conclude and could bring about new tariffs or other measures if officials deem them necessary for national

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