Taiwan’s move to defend its “silicon shield” is the latest sign of the island’s tech dominance being used as a bargaining chip in trade negotiations, as it faces increased geopolitical pressure to shift semiconductor manufacturing capacity overseas, according to analysts. It would be “impossible” to move 40 per cent of the island’s semiconductor capacity to the US, Taiwan officials have told the US, according to Taiwan vice-premier Cheng Li-chiun in an interview with local broadcaster Chinese...