After the Great Recession, Obama (with a republican house) did wrangle the deficit down for a few years in a row before Trump took over. They did it with revenue (taxes) and spending cuts.
So it’s been more like 9 years since congress did anything about it.
Then Trump and congress almost doubled it in a couple of years, then Covid hit and exploded it, then Biden and congress did nothing about it either. So here we are.
And, newsflash, Trump probably won’t lower the deficit this time around, either. DOGE ain’t cutting jack shit compared to overall spending. Just lowering the deficit will require taxation plus spending cuts (Republicans will never raise taxes, though). And a lower deficit is still a deficit, so it still adds to the debt. They’d need a surplus of revenue to reduce it.
Fun fact: 80% of the 36T debt is owned by the public, domestic and foreign . About 20% is owed to government agencies.