President Trump threatened Tuesday to “obliterate” parts of Iran if it attacked “anything American.” The message, delivered via tweet, followed Iranian President Hassan Rouhani saying the White House was “mentally handicapped,” following news of new U.S. sanctions.

Meanwhile, Iran said it would speed up enrichment of uranium, pulling themselves further out of the Iran nuclear deal as a Thursday deadline given to European leaders to take more decisive action to protect the agreement approaches. The U.S. pulled out of the deal last year.

Back in the U.S., Democratic Congressmember Ro Khanna and Republican Matt Gaetz unveiled Tuesday an amendment to the National Defense Authorization Act which would enshrine the need for congressional authorization before any military action can be taken against Iran.