WASHINGTON (AP) — The Trump administration imposed new sanctions Tuesday on a slew of North Korean shipping firms and Chinese trading companies in its latest push to isolate the rogue nation over its nuclear weapons development and deprive it of revenue.

The Treasury Department also designated a North Korean corporation involved in exporting workers overseas. The action came a day after the United States returned North Korea to its list of state sponsors of terrorism.

"These designations include companies that have engaged in trade with North Korea cumulatively worth hundreds of millions of do...