According to the U.S. Customs Authority, there are many reasons for denial to enter into the USA. Here are a few answers
to some of the questions you may have; as outlined by the U.S. government.
Before traveling to Canada from the States, it is best to know what is expected from you. Here are a few suggestions
that would help get you across the border. It is good to be prepared and do your due diligence with border crossing requirements to avoid disappointments.
All visitors should download their I-94 Arrival/Departure Record upon each new entry to the U.S. at https://i94.cbp.dhs.gov/I94/#/home
. The I-94 governs your period of lawful stay in the U.S. (not your visa stamp or USCIS approval notice.) You are solely responsible for tracking your lawful stay and that of your family members while in the United States.