When Exxon Mobil CEO Rex Tillerson detailed a $3.2 billion deal to drill for oil in Russia’s Arctic Sea two years ago, he predicted that the project would strengthen the ties between the U.S. and Russia. However, as WSJ reports, Exxon has instead wound up in the cross hairs of U.S. foreign policy, which could threaten one of the company’s best chances to find and tap significant — and much needed — amounts of crude oil.