The Wall Street Journal | Benoit Faucon and Ian Talley: The Trump administration is considering a more-aggressive enforcement of its economic sanctions on Iran—targeting more companies and financial institutions that do business with the Islamic Republic in an attempt to cut off lucrative sources of U.S. dollar-denominated hard currency, U.S. officials said.

The new sanctions on banks and businesses would be aimed at choking off trade including Iran’s petrochemical sales to Singapore and its consumer-goods sales to Afghanistan.

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