The North American Union

[politicallefty]

Mexico is too dissimilar in culture and personality for me to welcome a union with them, however, I would very much like to merge with Canada.

I agree with this. At the least, this:

I would adore having a customs union with relatively unrestricted free movement between the US and Canada

I hate that we've gone backwards on that issue over the past several years. I'd support completely open borders between the US and Canada.