By Jennifer A. Dlouhy, Bloomberg News

The Trump administration launched investigations into imports of robotics, industrial machinery and medical devices, setting the stage for fresh duties as President Donald Trump moves to expand his tariff regime.

The Department of Commerce is conducting the probes under Section 232 of the Trade Expansion Act, according to Federal Register notices. The inquiries started on Sept. 2. Under the law, which allows the president to tariff goods deemed critical to national security, the department has 270 days to deliver its policy recommendations.

The newly announced probes expand the potential sectors that could be exposed to tariffs, as Trump looks to encourage domestic manufacturing in key industries by hiking the cost of imports.

Investigations into i

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