At his first meeting with foreign oil majors, Mexico’s leftist president-elect pushed the companies to prove themselves by quickly pumping oil from recent finds, sources say, but gave no sign of offering up new fields to reverse dwindling output. President-elect Andres Manuel Lopez Obrador repeated a promise to respect more than 100 existing contracts awarded following a sweeping five-year-old energy overhaul as long as a review by his team finds no corruption. And he added: companies must show results, three executives who attended the meeting said. For U.S. independent Talos Energy, which is developing a high-profile, big offshore discovery announced last year along with partners Premier Oil and […]