Some officials in South Korea say agreeing to the pipeline investment might placate the U.S., but Trump is still threatening tariffs.

Investors have balked at the project, stalling its progress. But under the threat of tariffs, Japan and South Korea have started exploring ways to invest in Alaska L.N.G.

Different versions of the Alaska LNG project have been discussed in Alaska for decades, and there are longstanding questions about how it would pencil out.

Japan, South Korea and other countries want to partner with the United States in a "gigantic" natural gas pipeline in Alaska, U.S. President Donald Trump said on Tuesday, claiming they would invest "trillions of dollars each.

Alaska political leaders on Wednesday broadly welcomed President Donald Trump’s remarks to Congress talking up the prospects of the state’s long-sought but faltering natural gas pipeline. In his speech to a joint session of Congress on Tuesday night, the president said, “It will be truly spectacular. It’s all set to go.”

Alaska received a brief shoutout during President Donald Trump’s speech to the 118th Congress on Tuesday, touting the development of a major natural gas pipeline from the North Slope to Nikiski.

President Donald Trump on Tuesday touted his administration’s work on a proposed Alaska pipeline, underscoring his push to invigorate a long-stalled $44 billion project to transport natural gas across the state and export it overseas.

South Korea and the United States have agreed to establish a working-level group to discuss a gas pipeline project in Alaska, energy, shipbuilding, tariffs and non-tariff barriers, South Korea's Industry Minister Ahn Duk-geun said on Tuesday.

President Donald Trump said this week that Japan and South Korea were looking to work with the United States on a "gigantic" natural gas pipeline in Alaska.

Japan, South Korea, and other countries express interest in partnering with the U.S. on a massive natural gas pipeline in Alaska, with potential investments of trillions of dollars. Discussions are underway as countries seek to secure energy supplies and address trade deficits.