US President Donald Trump's push to steer $54 billion of South Korean investment into Alaska LNG is putting a fresh focus on a 20 million-ton-a-year export project that would cost more than twice as much as a comparable US Gulf Coast plant.

President Donald Trump could unveil plans as soon as Wednesday to tap South Korea's pledged strategic investment package for about $54 billion to build a liquefied natural gas facility in Alaska and several other major US projects, according to two people familiar with the discussions.