If you have a mortgage on your home in Canada you could carry a copy of that with you to prove financial ties and obligations that you are unlikely to abandon.
Visa Denials
The United States is an open society. Unlike many other countries, the United States does not impose internal controls on most visitors, such as registration with local authorities. In order to enjoy the privilege of unencumbered travel in the United States, aliens have a responsibility to prove they are going to return abroad before a visitor or student visa is issued. Our immigration law requires consular officers to view every visa applicant as an intending immigrant until the applicant proves otherwise.
WHAT IS SECTION 214(b)?
Section 214(b) is part of the Immigration and Nationality Act (INA). It states:
Every alien shall be presumed to be an immigrant until he establishes to the satisfaction of the consular officer, at the time of application for admission, that he is entitled to a nonimmigrant status...
To qualify for a visitor or student visa, an applicant must meet the requirements of sections 101(a)(15)(B) or (F) of the INA respectively. Failure to do so will result in a refusal of a visa under INA 214(b). The most frequent basis for such a refusal concerns the requirement that the prospective visitor or student possess a residence abroad he/she has no intention of abandoning. Applicants prove the existence of such residence by demonstrating that they have ties abroad that would compel them to leave the U.S. at the end of the temporary stay. The law places this burden of proof on the applicant.
Our consular officers have a difficult job. They must decide in a very short time if someone is qualified to receive a temporary visa. Most cases are decided after a brief interview and review of whatever evidence of ties an applicant presents.
WHAT CONSTITUTES "STRONG TIES"?
Strong ties differ from country to country, city to city, individual to individual. Some examples of ties can be a job, a house, a family, a bank account. "Ties" are the various aspects of your life that bind you to your country of residence: your possessions, employment, social and family relationships.