U.S. President Donald Trump threatened to charge South Korea more, and later said he would double the amount, if Seoul does not soon agree to participate in an Alaska liquefied natural gas project. Trump made the remarks two days after unveiling a $200 billion package of South Korean investment in U.S. energy projects under a trade agreement that reduced U.S. tariffs on South Korean goods to 15%. The package includes Alaska LNG, a gas-fired power plant in Texas and eight large-scale U.S. nuclear reactors. South Korea says it has not finalized participation in Alaska LNG and will assess the project's commercial viability and comply with domestic legal procedures. Trump has put South Korean investment in the pipeline at $54 billion, while U.S. Commerce Secretary Howard Lutnick has cited more than $50 billion; a joint fact sheet did not specify an amount. The proposed project would build a 1,298-kilometer pipeline from Alaska's North Slope to southern Alaska, where gas would be liquefied for shipment to Asia.