U.S. President Donald Trump went into the Iran war convinced that America’s vast oil wealth would insulate the country from the kind of energy shock now battering much of the world. Four weeks into the conflict, that shield is looking fragile.Trump’s wager has only partly paid off. U.S.<p><p>https://www.marinelink.com/news/us-oil-shield-starts-showing-cracks-iran-537147</p></p>