Mr. Speaker, the border operation is a three-part process. First of all, for those who cross the border outside of ports of entry, they are arrested by the RCMP. When the RCMP has done its security check, they are turned over to the CBSA for further processing. If they pass that security check, they proceed to Immigration, Refugees and Citizenship Canada officials for consideration of their eligibility. It is a very detailed process, and security is not compromised.
In the House of Commons on June 5th, 2018. See this statement in context.