The North American continent will be ours, thus it would be most appropriate for us Americans to rename this continent to simply be called America. We can just rename South America to Columbia.
First, we will start by inviting Western Canada and the Canadian territories into the Union (Eastern Canada will need some more time). While we're at it, we can invite Greenland and make Puerto Rico into a state. Northern Mexico has been getting closer to the US for the last few decades now; so when the opportunity comes, we ought to invite them into the Union and make the border smaller. Lastly, we ought to free Cuba from its oppression and see if they would be willing to join our Union and place them back into US hands again.
My vision is that The United States of America becomes a continent-wide civilization that spans North America, or rather, America. It would be a project that would take a century or two, but it would be so worth it.
Can we exclude French Canadians?