14 trillion dollar current debt with a annual deficit of 1.5 trillion. That is currently $45000 owed by each and every person in the US, growing an additional $4000 every year. Add to that the hundred trillion of unfunded promises the government has made and we know it cannot ever be paid. If you reduce the deficit $100 billion per year until the budget is balanced, and then continue to reduce the debt $100 billion per year, it will take 258 years to break even.
That is why neither party seriously tries to address it.