Politico:

The Trump administration and its domestic political allies are laying the groundwork for a possible confrontation with Iran without the explicit consent of Congress — a public relations campaign that was already well under way before top officials accused the Islamic Republic of attacking a pair of oil tankers last week in the Gulf of Oman.

Over the past few months, senior Trump aides have made the case in public and private that the administration already has the legal authority to take military action against Iran, citing a law nearly two decades old that was originally intended to authorize the war in Afghanistan.

In the latest sign of escalating tensions, National Security Adviser John Bolton warned Iran in an interview conducted last week and published Monday, “They would be making a big mistake if they doubted the president's resolve on this.” Acting Secretary of Defense Patrick Shanahan announced on Monday evening that the U.S. was deploying an additional 1,000 troops to the region for “defensive purposes.” And Secretary of State Mike Pompeo jetted to Tampa, home of Central Command, on Monday evening to huddle with military officials to discuss “regional security concerns and ongoing operations,” according to a State Department spokeswoman.

The developments came as Iran announced it was on course to violate a core element of its nuclear deal with major world powers, exceeding the amount of enriched uranium allowed under the agreement in 10 days unless European nations intervened to blunt the economic pain of American sanctions. And they came as U.S. officials promoted video footage and images showing what they say were Iranian forces planting explosive devices on commercial oil tankers.

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