Oil and gas producers in the US will not raise output significantly in the coming years despite calls from President-Elect Donald Trump to “drill, baby, drill,” said Exxon Mobil Corp.’s Upstream President Liam Mallon.

U.S. oil and gas producers are unlikely to radically increase production under president-elect Donald Trump as companies remain focused on capital discipline, a senior executive at Exxon Mobil said on Tuesday.