Grounds of Inadmissibility
Foreign citizens, including citizens of Canada, who apply for admission to the U.S. at a port-of-entry border or at an international airport, or who seek permanent residence (a green card) at a U.S. consulate or through adjustment of status, must prove that they do not fall under one of the numerous grounds of inadmissibility. Failure to do so may result in a denial of admission to the U.S. or of permanent residence. A foreign citizen bears the burden of proving that he or she is clearly and beyond a doubt admissible to the U.S. See INA §240 (c)(2).
The following is a list of the primary grounds of inadmissibility found under INA § 212. Canadian citizens falling under one of these grounds may not gain admission to the U.S. under any status, including TN visa status, except as otherwise provided.