The following provides an outline of the TN visa to green card process based on marriage to a U.S. citizen and focuses on the Adjustment of Status (AOS) application process option.
As with all other options, the U.S. citizen must "sponsor" the TN visa worker for the green card, and must prove the bona fides of the marriage (I-130 petition).
More on I-130 Filing→
The TN visa worker must meet the basic requirements for AOS (I-485 Adjustment of Status application).
More on I-485 Filing→
As required in all other options, the U.S. citizen must agree to financially support the applicant (I-864 Affidavit of Support).
More on I-864 Filing→