There is a loophole, change it and let it be challenged in court. Trudeau has a mandate to amend the laws to close the loophole and if it is overruled by the SC, create a strong disincentive for anyone who crosses illegally in terms of  indefinite detention in a secure facility (with no chance of public release) combined with expedited deportation hearings. If it is expensive now, imagine what happens if the Government continues to dither and hundreds turn to thousands.  Increase patrols with expanded border protection at spots most common for illegal entry and work with US authorities to stop suspected migrants before they cross. If the government is willing to stop illegal migrants, they have the tools and the resources to act. The situation will only get worse unless the Government makes it clear the integrity of our borders will be enforced.