Trump's 300% tariff threat raises the price of Seoul saying no to Alaska LNG

The day before the Ohio rally, Trump had already put a price on a Korean refusal ^[5]. He rejected suggestions that he had moved too quickly on Korean participation in Alaska LNG and said: "I didn't jump the gun. I mean, they were there and they were represented." ^[9] If South Korea did not want to proceed, "that's okay with me. I'll just charge them more," he said ^[10]. In Vandalia, Ohio, on Saturday, he named South Korea with China, Japan and Canada as countries whose companies his tariffs had pushed into US manufacturing ^[1][3]. The low end of his 150% to 300% range is ten times the 15% rate Korea bought with its pledge, and the high end is twenty times ^[2][6][2].

Seoul's caution is about cost. The project needs an 800-mile pipeline from Alaska's North Slope to Nikiski, a gas treatment plant and a liquefaction terminal ^[13]. Glenfarne's estimate for all of it equals 22% to 27% of the $200 billion strategic tranche ^[7][1]. A Korean stake could be far smaller than the whole, and Seoul says it has not decided whether to invest or how much ^[8].

The bargaining is over who absorbs the losses. President Lee Jae Myung said in September that the sticking points included the split of returns and the treatment of losses on projects that turn out unprofitable ^[14]. Lee said Seoul wanted the term "commercially reasonable" written into the agreement ^[15]. Industry Minister Kim Jung-kwan has said Korea should not put money into projects that fail commercial standards, while acknowledging that pulling out could expose Seoul to renewed US tariff pressure ^[16].

Beyond the Encinal plant ^[17], the larger candidates are still in review. The two governments have discussed eight large nuclear reactors, and Korean officials say those still need separate reviews before any final investment decision ^[18]. The $150 billion for shipbuilding sits in its own bucket ^[7]. The Alaska fight is about how the $200 billion strategic half gets filled, and so far Seoul is spending its effort keeping the largest candidate out of the confirmed column.

Three outcomes fit the record. Seoul takes an Alaska stake small enough, with loss terms firm enough, to call commercially reasonable. Or it declines and Washington raises the 15% rate, the cost Kim has already conceded. Or the Vandalia range stays a campaign line after the Nov. 3 midterms ^[4]. The reported remarks do not define what counts as building a plant or say which goods would be covered ^[2].

I think the $350 billion is a ceiling Seoul is filling one review at a time, and the tariff threats are how Washington presses for those reviews to end in yes. The opposing view is that the tariff leverage wins outright: if every refusal draws a higher rate, "commercially reasonable" cannot be enforced, and Seoul pays for the pipeline later instead of now. A Korean final investment decision on Alaska LNG, with a stated amount and no terms on losses, would prove that reading right and mine wrong.