The main reason Bombardier sold the CSeries to Airbus was that it was about to be hit with big tariffs that would have made it noncompetitive in the U.S. market

The main reason Bombardier sold the CSeries to Airbus was that it was about to be hit with big tariffs that would have made it noncompetitive in the U.S. market. Airbus has a U.S. production plant in Alabama that can do final assembly and avoid the tariffs.