Threaten to cancel the super hornet deal. Levy hefty border tax on Boeing for Air Canada's 737 order and that's just a start.

Boeing has been getting subsidized and dumping aircraft for decades.  Billions in extra defence dollars in order to dump airliners.  This will be proven to be baseless but I'm sure the hope is Trump will lose his mind and take unilateral twitter action.

In the end Boeing knows they have an inferior  product.  Bombardier's CSeries is FAR AND AWAY a better product than a 60's vintage aircraft with a few modern updates.