If you are traveling to United States of America with Canadian passport in most cases you do not need to obtain entry visa to United States of America at the consulate beforehand. The period of stay though may be limited by the laws of United States of America. You may check what is the allowed period of stay at the United States of America consulate in Canada. All other applicants should check information on United States of America visa requirements, procedure, application forms, fees and processing timings may be found here: https://usa.visacenter.ca/.
If you are traveling to United States of America with Canadian passport in most cases you do not need to obtain entry visa to United States of America at the consulate beforehand. The period of stay though may be limited by the laws of United States of America. You may check what is the allowed period of stay at the United States of America consulate in Canada. All other applicants should check information on United States of America visa requirements, procedure, application forms, fees and processing timings may be found here: https://usa.visacenter.ca/.