At first sight, the recent US executive order blacklisting Chinese group Huawei looks like a classic Donald Trump move: brash, assertive, nationalistic. But look closer and it is clear that putting “America first” could ultimately mean the US finishes last.

The US pushback against Huawei began with its 5G infrastructure business. Citing security concerns, the US made a concerted effort to convince western allies to drop the company from their 5G networks — with mixed success. The fight has now morphed into a broader ban that makes it near impossible for US companies — and any firm with US interests — to do business with any part of the Huawei empire. That includes Huawei’s up-and-coming consumer division, the world’s second-biggest smartphone producer.

For Huawei, it looks like a body blow. US groups such as Qualcomm must stop supplying it, but so must UK-based Arm, which has American ties. Then again, Huawei is the world’s biggest telecoms equipment manufacturer, and only draws a small, if important, part of its inputs from the US. The Chinese group could work round the ban, if it finds suppliers to replace the high-end mobile phone glass it gets from Corning.