I don't think it's possible. Maybe default or hyperinflation will take care of it.
You don't really have to take care of it. Just keep rolling over the debt in perpetuity and make sure that it doesn't balloon into something unmanageable. As long as the interest is serviced, the debt holders might not have an issue. The problem comes when the US won't be able to refinance this debt, but that is highly unlikely.
If the debtor nation refuse to raise interest rate, inflation will be rampant. Debt will continue to pile up and capital will leave the country.
If the debtor nation raise interest rate, that will create budget problems at the federal and state level.
The interest paid to China alone can fund their entire military budget for the year. Anyone else see the seriousness in this?