Trump making the claim Canada should be the 51st state reeks of his general ignorance on facts. But that never stopped him in the past.
As mentioned above, Canada has 10 provinces,, and NEVER would they agree to be one state joined as part of the USA. They would want to maintain their individual provinces. And there are a number of territories, and they would not want to be part of one big state either.
It will not happen with his insulting them by referencing one state for the entire state. And the whole of Canada is uber liberal, so once again, we would never see Republican leadership in Washington. As the Republican POTUS to be, you would think he would be smarter about the politics.
We have enough problems, we surely do not need to add Canada to the list.
Better relations between the two countries would be welcome. I was treated so horribly last time I flew there, I told the custom folks this is the last time I will ever come to this dumb *ss country. I haven't been back.