Your interest rates have to be higher to attract investors because they see more risk. Like many, I have a fair amount of my portfolio in USD investments but I have told my adviser that I'm not interested in increasing my exposure. Certainly not when Trump is threatening things like 50% withholding on foreign investors. The man is just too unpredictable to have any confidence in putting money into the US.
Debt servicing is your #2 expense after social security, eventually 100% of your tax revenue will go into servicing debt. No investor will want your paper when that happens. They are shying away from it already.