President Donald Trump has warned of ‘fairly substantial’ tariffs on semiconductor imports from companies that refuse to shift production to the US. Speaking at a White House dinner with tech leaders including Apple’s Tim Cook and Meta’s Mark Zuckerberg, Trump said firms investing domestically would be spared. Apple, which pledged $100 billion in US manufacturing, would avoid levies. The move underscores Trump’s push to strengthen supply chains and reduce reliance on foreign chipmakers.