He hasn’t even taken office yet, but Donald Trump is already playing dangerous games with China and risking nuclear war.

Yesterday on Fox News, Trump blathered ignorantly about China and Taiwan again, threatening to use the “One China” policy as a bargaining chip in “deals:”

“I don’t know why we have to be bound by a One China policy unless we make a deal with China having to do with other things, including trade. … I mean, look … we’re being hurt very badly by China with devaluation; with taxing us heavy at the borders when we don’t tax them; with building a massive fortress in the middle of the South China Sea, which they shouldn’t be doing; and, frankly, with not helping us at all with North Korea.”

Today in the Washington Post, Steven M. Goldstein, director of the Taiwan Studies Workshop, explains why this isn’t just an ignorant statement — it risks dragging the US into a pointless and unnecessary war with China.

Trump’s suggestion that One China is another bargaining chip, which the United States can play or not play as it likes, is both misleading and risky. On the one hand, it apparently misses the subtle, but extremely significant, differences between the American “one China policy” and the Chinese “one China principle.” On the other, it endangers the central tenet of American policy in the area — the maintenance of the status quo. The Trump transition team has already referred to Tsai Ing-wen as “President of Taiwan.” This publicly undermines the only aspect of the One China issue where the United States and China actually agree — that Taiwan is not a state, while starkly exposing the reality of the quasi state-to-state relationship that the American One China policy obscures. By using Taiwan’s status as a negotiating ploy, Trump is doubling down on this dangerous strategy. China’s vital national interests are in conflict with U.S. policy, and stable relations are fragile, because all the parties are unhappy with the present situation. If the incoming administration persists in its apparent careless indifference, it runs the risk of grossly destabilizing U.S.-China relations, and even risks war.