> The CFR Sovereign Risk Tracker can be used to gauge the vulnerability of emerging markets to default on external debt.

Sort of definitionally, nothing in that list is going to be more politically stable than the US.

In the second link, the author gives slightly lower country risk premiums (0% vs 0.2%) to Australia, Canada, Denmark, Germany, Liechtenstein, Luxembourg, Netherlands, New Zealand, Norway, Singapore, Sweden, and Switzerland. Setting aside the practicality of these recommendations (how much debt does Liechtenstein issue? or Germany, for that matter?): in a world where the US is unstable, it's hard to imagine Canada being risk-free.