That’s what happens when you give away huge tax breaks for the rich without spending cuts.
It is why, whenever a Dem Potus takes over the Republi'cans' suddenly become fiscal conservatives concerned about the debt.
Imagine your wife always piling on debt on the family until you were almost bankrupt, but every 4 years or so you locked her from all the accounts and credit cards while you paid down the debt and fixed things.
your family feels richer while she is piling on debt as you spending $1.25 for every dollar you earn. Your family feels richer off the sugar high of the debt.
Then, when you are forced to pay it down, the family feels poorer. You are living off $0.80 of every dollar while using $0.20 to pay down debt.
Trump and GOP are the wife. They feed derps the sugar high, by piling on debt, and derps say 'we feel great', but the republi'cans' know it is not sustainable so they scream at the Dems to be fiscally responsible and pay it down.
Each cycle you see that EXACT thing happen, as no matter how the Republi'cans' receive the economy, they will go instantly to piling in debt.
Trump's term specifically is insightful. The normal thing for him to do, after inheriting a hot economy from Obama, who had just turned it down, would have been for him to cool spending, pay down debt, and have Clinton like surplus. But instead he demanded they increase the cheap debt, and push the sugar high to new heights, so he could claim the credit.
Had Trump actually been responsible and gave us a Clinton like surplus run, then when the Pandemic hit, the US would have coasted it thru it much more easy. Trump made the job for Biden way tougher than it needed to be, but Biden excelled regardless.