The head of U.S. oil giant Exxon Mobil on Friday told President Donald Trump that Venezuela is “uninvestible” under current conditions, saying major changes were needed before his company would return to the country that has seen its crude oil resources sink into disrepair. The comments by Exxon CEO Darren Woods were a blow to Trump’s hopes that American oil majors would move quickly to make big investments in Venezuela — and cast doubt on the president’s insistence that U.S. companies are prepared to spend $100 billion or more.