Canada's relatively lenient immigration laws, combined with the largely open U.S. border, are a source of continued concern for U.S. officials who fear that would-be terrorists and other criminals could enter the United States.

CNN: World - U.S., Canada sign pact to tighten border security

Similarly, because of the uncertainties brought on by the quota, many of the H-1B candidates, who are job creators and innovators and would allow the U.S. companies to compete in the global marketplace, have decided to settle in Canada and other countries with more liberal business immigration laws.

FORBES: Drive Business Back To The U.S., Reform H-1B Visa Laws