When the national debt crossed $39 trillion last week, politicians from both parties offered familiar responses. Democrats pointed to Republican tax cuts. Republicans pointed to Democratic spending. Both were right. Both were also deflecting.

The honest truth is that $39 trillion is a bipartisan achievement — built over decades by politicians of every stripe who found it easier to borrow than to choose.

The Numbers Don’t Lie

When Ronald Reagan took office in 1981, the national debt stood at roughly $1 trillion. It seemed enormous at the time. Today it looks quaint.

Here’s how the debt grew under each president since:

Every president since Clinton has added trillions. No administration — Republican or Democrat — has achieved a sustained reduction in the debt-to-GDP ratio in the 21st century.

What’s Actually Driving It

Understanding the debt requires separating its components. The federal budget has three main categories: mandatory spending, discretionary spending, and interest payments.

Mandatory spending — Social Security, Medicare, Medicaid, and other entitlement programs — now consumes roughly two-thirds of the federal budget. It grows automatically each year based on formulas set in law. Politicians don’t vote on it annually. It simply runs.

Discretionary spending — defense, education, infrastructure, federal agencies — gets debated and voted on each year. This is the part politicians fight about loudest, even though it’s a smaller share of the problem.

Interest payments are now exceeding $1 trillion per year, projected to surpass $2 trillion by 2036. They are the fastest-growing part of the budget and produce nothing in return.

The uncomfortable reality is that to seriously address the debt, Congress must address mandatory spending. Everything else — every DOGE initiative, every agency elimination, every discretionary cut — is fighting at the margins. Meaningful fiscal reform requires touching the third rails of American politics: entitlements.

What the Conservative Plan Must Include

Conservatives who are serious about the debt — and not just using it as a talking point when the other party is in power — must be willing to say what they support cutting and what they support reforming.

The Trump administration’s DOGE effort has reduced federal employment and targeted waste and fraud. These are real achievements. The administration also projects that tariff revenue and economic growth will bring deficits down over time — a projection that deserves both support and scrutiny.

But the CBO projects a $1.9 trillion deficit this year and deficits averaging more than 6% of GDP for the next decade. Those numbers cannot be moved by efficiency alone. They require structural reform — phased adjustments to entitlement eligibility ages, means-testing for high-income recipients, and a credible commitment to spending growth below economic growth.

That is the honest conservative position. Not “cut everything” and not “don’t touch entitlements.” But a serious, phased, principled plan to put the debt on a downward path as a share of the economy.

The Cost of Inaction

The Peterson Foundation found that nine in ten Americans say rising debt is driving up their cost of living. They’re right. Higher government borrowing means higher interest rates across the economy — for mortgages, car loans, business investment, and credit cards.

Every year we delay reform, the required adjustments grow larger and more painful. The CBO warns that without action, debt will reach 175% of GDP within two decades — a level that no major economy has sustained without a fiscal crisis.

This is the inheritance we are building for our children. Conservatives who truly believe in responsibility, in living within one’s means, in not burdening future generations — this is the moment to mean it.