U.S. oil and gas supermajor Exxon does not expect American producers to gear up in a “drill, baby, drill” mode once Donald Trump becomes U.S. President, as companies will maintain the spending discipline of the past few years. “We're not going to see anybody in 'drill, baby, drill' mode," ExxonMobil Upstream President Liam Mallon said at the Energy Intelligence Forum conference in London, as carried by Reuters. “A radical change (in production) is unlikely because the vast majority, if not everybody, is focused on the economics…