The deficit level is also very extreme in US. Everything so far under Trump means much higher levels, and low growth so that expands faster as % of GDP. The illusion that deficits/debt is free is something GOP complains about when they are out of power, but their "more tax cuts for the rich solution" and soylent green for the rest when they get power doesn't solve the problem.

Collapse of the US will harm world, economically. A good defense to being an attractive takeover target, unfortunately, is defend Canada through large deficits to match their collapse timing, unless we stop making US enemies are own enemies.