[Modernman]

Each province becomes a state.

The Maritime provinces are probably too small the become individual states (Prince Edward Island has 100,000 or so people). You'd probably see about 6 new states- British Columbia, Ontario, Quebec, Alberta, Sasketoba (Manitoba + Sasketchewan) and combined Maritime State. Canada is about 1/10th the size of the US, population-wise, so creating 5-6 states probably is about right.

[xzins]

There's no rule I know of that says the United States was supposed to get to 50 and then stop.

56 sounds better to me.

And manifest destiny says it will someday include the states of Mexico, Latin America, and the Carribbean Island nations. The United States of North America.