U.S. President Trump's executive order was to block temporarily people from certain Muslim countries from entering the U.S.A.  It wasn't about people already legally  in the U.S.A.. and Trump's order was overturned anyway.

Many of the people now crossing from the U.S.A. into Canada illegally are originally for Somalia. They were already in the U.S.A. and were safe and had asylum in the U.S.A. They didn't have to leave the U.S.A. and enter Canada illegally.

And what is it that people don't get about illegal.?

And, if people enter Canada illegally, is it legal for people in Canada to aid and abet and to help, house and harbour people who have entered Canada illegally?

And, if the migrants don't meet the criteria to stay in Canada and if the U.S.A. and/or their countries of origin won't take them back, will Canada get stuck with the migrants at the expense of Canadian taxpayers?