Started during Donald Trump’s first term in office, between 2017 and 2021, they have continued under Joe Biden.The struggle is reshaping relationships and supply chains the world over. And its costs are mounting. Estimates vary, but the imf reckons that the elimination of high-tech trade across rival blocs could cost as much as 1.2% of global gdp each year about $1trn.The temperature of the confrontation is likely to rise over the coming years. Neither Mr Biden nor Mr Trump will shrink from challenging China, perhaps the issue which enjoys the highest level of bipartisan support in Washington. Can China overtake US technology ?

