These tariffs were brought about due to action by rival U.S. aerospace company Boeing, which alleged that the C-Series jets were uncompetitively cheap to due generous subsidies given to Bombardier by the Canadian Government.
Doerksen doesn't expect any US airline will order the CSeries until the Boeing challenge is resolved. The US Government believes that exporters received countervailable subsidies of 219.63 percent.
Bombardier called the decision "absurd", and accused Boeing of trying to stifle competition.
Accusations of the subsidies were leveled by USA airplane maker Boeing. The tariff imposed by the USA on Bombardier's CSeries jet is an "attack" on Quebec and Canada, the province's Premier Philippe Couillard declared.
"Following the Commerce Department's recent decisions, this process will move to the U.S. International Trade Commission, which has to determine whether Boeing suffered any material injury as a result of the contract between Bombardier and Delta". German industrial company Siemens AG on Tuesday agreed to merge its rail operations with French train maker Alstom SA instead of Bombardier. "We have contracts in place with Boeing for new maritime patrol aircraft and for Apache attack helicopters and they will also be bidding for other defense work and this kind of behavior clearly could jeopardize our future relationship with Boeing".
Separately, Europhile MPs said the decision showed the folly of Brexit, given the Government has repeatedly claimed a free trade deal with the States would make up for any loss of trade with the EU.
Her mission was clear - to have Trump intervene and get Boeing to back down. He has repeatedly criticized Canada, saying it unfairly blocks USA dairy products and subsidizes its softwood lumber industry.
Couillard has asked Prime Minister Justin Trudeau, who's already put a planned purchase of military equipment from Boeing on hold, to take a "hard line" against the American company. British Prime Minister Theresa May has discussed the case with Trump.
The DUP it would be fighting to keep the plant open in Belfast, the largest manufacturing employer in Northern Ireland.
Tuesday's finding bolsters Boeing's claim that a $1 billion bailout from the Quebec regional government and $149 million in development loans and other aid from the United Kingdom government in 2008 helped give Bombardier an unfair advantage.
Commerce's findings Tuesday aren't the end of the matter. "Early next month, Commerce is expected to confirm the magnitude of the illegal dumping and announce additional duties". Even then, the International Trade Commission also has to make a final determination on February 1, 2018.
For Bombardier, the United States announcement was as a double blow, coming on the same day that news broke of a tie-up between German train-maker Siemens and France's Alstom to create a rail juggernaut that would compete with Bombardier's struggling rail division.