President Donald Trump on Wednesday announced that the South Korean government will invest up to $200 billion in US energy infrastructure, covering eight large-scale nuclear power plants, a six-gigawatt power generation facility in Texas, and the long-discussed Alaska liquefied natural gas (LNG) pipeline. The announcement, made at a White House event, marks what Trump described as 'one of the largest energy infrastructure investments in American history.'

What the Investment Covers

The commitment includes $54 billion earmarked specifically for the Alaska LNG project, alongside the Texas power facility and eight new nuclear plants. Trump quoted himself directly at the event: 'Thanks to the agreements my administration has secured with the Republic of Korea, they will invest up to $200 billion; that's the Korean government, $200 billion to build a six-gigawatt power generation facility in Texas.'

The Alaska pipeline would span 807 miles (roughly 1,300 kilometres), running from the state's North Slope to an export terminal in southern Alaska. The terminal is designed to produce up to 20 million metric tonnes of LNG annually, according to the White House. LNG is natural gas cooled into liquid form for transport by ship.

Context: Broader US-South Korea Deal

The investment commitments fall under a larger $350 billion trade deal and strategic investment memorandum signed between the two countries in November 2025. That framework included $150 billion in shipbuilding investment and $200 billion in additional strategic investment. A joint White House fact sheet noted that South Korea would not be required to provide more than $20 billion in US dollars in any single calendar year, effectively spreading the commitment over multiple years. A White House official, speaking on background, said the investments would 'advance US energy projects and strengthen trade, investment and energy security between the two countries.'

Notably, Wednesday's announcement concerns investment commitments, not transfers. Trump's use of 'up to $200 billion' sets a ceiling; it does not confirm the full amount has been disbursed or spent.

Alaska LNG: A Long-Deferred Project

The Alaska LNG project received US federal regulatory authorisation in May 2020, but has remained in development limbo since. Its developer describes two financially independent phases: a pipeline supplying Alaska's domestic market, followed by a liquefaction facility and related export infrastructure at Nikiski. Glenfarne holds a 75% stake in the project, with the remaining 25% owned by the state of Alaska through the Alaska Gasline Development Corporation. The White House also said the pipeline would provide a reliable, year-round gas supply for Alaska residents and lower their energy costs — though those benefits depend on the project actually being developed.

Trump credited Republican Senator Dan Sullivan of Alaska with long championing the pipeline and thanked him for his involvement. Commerce Secretary Howard Lutnick, Interior Secretary Doug Burgum, Energy Secretary Chris Wright, and Alaska Representative Nick Begich were also present at the event.

Geopolitical and Energy Security Implications

The deal signals a deepening of US-South Korea strategic and economic ties at a time when Washington is actively courting allied investment in domestic infrastructure. For South Korea, the commitment locks in energy supply chains and deepens bilateral trade links, potentially shielding Seoul from tariff pressure. This comes amid broader US efforts to attract foreign capital into its energy transition and nuclear build-out, with South Korea joining a growing list of allied governments making large-scale US investment pledges. Whether the commitments translate into shovel-ready projects will depend on project financing, regulatory timelines, and the pace of disbursement.