Essex MP Tracey Ramsey is coming out against the latest reports on a future revised Trans-Pacific Partnership trade deal.
On Tuesday, Canada and the remaining members of the old TPP deal announced they will forge ahead without the United States.
Few official details have been released on the new agreement.
Ramsay says the deal lowers the percentage of how many pieces of an automobile have to be made in Canada.
The New Democrat says she is "incredibly disappointed" and worried about the impact it will have on Windsor-Essex and Southwestern Ontario.
"All of the economic models that have been done on it, show up to 15,000 jobs lost in Canada and 0.1% growth in GDP," she says. "This will actually end up hurting us, and in our region and in Southwestern Ontario it will have a damaging impact."
She says under the deal, only 25%-35% of parts will have to be made in the country putting Canada at a disadvantage.
"What that does is essentially open a back-door to China, to be able to go into these other TPP countries, to funnel their parts through there, using that very low threshold."
Unifor has also come out against the deal - calling it a "broken promise."
Besides Canada, the new deal's partners are Australia, Brunei, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, and Vietnam.
--With files from AM800's Teresinha Medeiros