If you were interviewed for L-1B visa before and it was granted, U.S. Consulate may entertain your application. If they reject it, you have to travel to home country.
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J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.
I think because of the distance you should be okay going to consulate in Canada but I have never heard that reapplying is easier than applying for an extension. In my opinion the only time applying is easy is when it's a start-up new business. Regardless if whether its an extension or a new application the same facts and financial ability must be demonstrated.