“The United States government has continuously had a fluctuating
public debt since its formation in 1789, except for about a year during 1835–1836, a period in which the nation, during the presidency of
Andrew Jackson, completely paid the national debt.”
There’s your answer on whether it will ever be paid.
Two centuries of relentlessly spending more than the take from taxes, necessitating more borrowing. This is regardless of the political party in control of Congress or the Presidency. No fiscal discipline because it’s OPM to them.