The departure of Rex Tillerson as the top U.S. diplomat could end the Iranian nuclear deal and send oil prices sharply higher as a result, analysis finds. U.S. President Donald Trump unceremoniously dumped Tillerson using a statement Tuesday on Twitter. Tillerson, the former head of Exxon Mobil, was among the voices encouraging Trump to stick with an agreement that gives Iran relief from sanctions pressure in exchange for commitments to draw down its nuclear research program. The Trump administration, paradoxically, is looking to build up its diplomatic corps for possible nuclear détente with North Korea. Mike Pompeo, the head of the Central Intelligence Agency who has been tapped to fill Tillerson’s shoes, has long been an opponent of […]