Among the various criteria that Canada normally looks at when we do a visa review—and it is applicable for Mexico, it is applicable for other countries—is the approval rate for a temporary visiting visa. We also look at the number of refugee claims made by citizens of such a country in the past few years. We look at the number of inadmissibilities, so how many people were found inadmissible to Canada coming from this country. We look at the integrity of the travel documents, among other criteria.
On November 15th, 2016. See this statement in context.