... but for Boeing to shriek hysterically about an airliner (that doesn't compete with their model range) surely speaks volumes that the C series is a terrific aircraft, which is more likely the reason for the complaint.
For the M1 tank argument that a Government wants to support an industry, then that argument equally applies to Bombardier support from Canada and UK....
I think we all realise that there are "assists" from all Governments at times to support R&D and service introduction, be it military or commercial.
Are the new generation Chinese airliners "correctly" priced?
What the US have done by imposing a 220% tariff is to expose themselves to ridicule and pot/kettle comparisons. This is America under Trump where bluster and hyperbole count more than facts and truth.
... but what do I know? 4,000 jobs in NI and UK on the line? Let's see a sensible compromise.... uh oh, perhaps sensible is too much to ask of politicians....