A spouse’s Canadian citizenship does not make you a Canadian citizen or independently satisfy your TN nationality requirement. If your spouse qualifies as the TN principal, you may instead need to examine TD eligibility as their spouse. TD itself does not authorize you to work.
Identify who would hold which status
Create a household plan that names the proposed principal and each dependant instead of using TN as a family-wide label. Consider each person’s citizenship, actual employment plans and relationship evidence. A spouse may have a separate immigration route, but that needs independent review.
If the household budget requires both adults to earn U.S. employment income, do not assume a TD arrangement meets that need. The choice of principal should follow the real job and eligibility evidence, not simply whichever passport is convenient.
Handle each adult's nationality as a separate question with a separate answer. A spouse's Canadian citizenship establishes the spouse's own position and does not extend a nationality-based eligibility to anyone else; derivative status flows from a principal who qualifies, not from a family member who does. It is worth asking, though, which adult in the household is better placed, because families frequently assume the principal without testing it.
Hypothetical example: where one partner is a registered nurse holding Canadian citizenship and the other is a permanent resident with the U.S. offer, the household may have options it has not considered, and the better arrangement depends on facts counsel should assess. Whoever proceeds, remember that TD status carries no permission to work, so a second income requires its own basis rather than following automatically.