What if the government has no plan, because there  is no ready solution ? Our border is so long that putting up new official checkpoints wouldn't solve the problem, as those wanting to cross would just move elsewhere. They could try to speed up the deportation hearings, but then means hiring and training people which would take time, and that still wouldn't solve the problem. If you were a Haitian, or one of the hundred thousand plus people from a number of Latin American countries who are also facing deportation , you have nothing to lose by coming to Canada. You know you are going to be deported if you stay in the States, at least you have a possibility in Canada. The numbers will go down as the weather gets colder but this is a problem that will be with us for some time.Governments almost never say they can't solve something, for fear of losing the confidence of the people. However this is one time that they should, as they are losing  confidence by pretending they can solve it.