Originally Posted by
Longtimer
It's a mostly open border and as has been proven in the past 2 years (people fleeing the US) it is easy to sneak across.
but here is an article:
Flying to Canada and then onto the States will not be a practial option for most people. It is not really that easy to sneak into the US over the Canadian border for the average person. If you show up at a border crossing with an passport from any of the countries involved you will almost certainly be questioned and likely refused entry.