If interest rates become low enough, the Federal Reserve will print more money, and the US will borrow more, leading to increased national debt at a lower rate and potentially paying off older debt.
"I think when rates become low enough and the US wants to borrow once again to borrow out a very low rate if we ever get to a lower rate and yeah I think that the Federal Reserve can print more money and the us will borrow more therefore increasing its debt but at a lower rate and hopefully paying off some old"