Federal Debt Is Now Worrying Even Progressives

The 119th Congress began, as it so often has in recent years, with calls from Republican politicians for wrestling down the national debt, which is near a record level relative to the size of the economy.

But this time, the G.O.P. had company: Progressive economists and budget wonks, who have often dismissed finger-wagging about debt levels as a pretext for slashing spending on programs for the poor, are starting to ring alarm bells as well.

What’s changed? In large part, long-term interest rates look unlikely to recede as quickly as had been hoped, forcing the federal government to make larger interest payments. And the Trump administration has promised to extend and expand its 2017 tax cuts, which will cost trillions if not matched by spending reductions.

“I find it easier to stay calm about this threat when I think the interest rate is low and steady, and I think in the past year or so that steadiness has been dented,” said Jared Bernstein, who led the Council of Economic Advisers in the Biden administration. “If one party refuses to raise revenues, and the Democrats go along more than is fiscally healthy, that’s also a big part of the problem.”

To be clear, conservative warnings on the debt have generally been met with little action over the past two decades. A paper by two political scientists and an economist recently concluded that after at least trying to constrain borrowing in the 1980s and 1990s, Republicans have “given up the pretense” of meaningful deficit reduction. Democrats and Republicans alike tend to express more concerns about fiscal responsibility when their party is out of power.

Historically, the stock of debt as a share of the economy has risen sharply during wars and recessions. It peaked during World War II. In the 21st century, Congress has not managed to bring the debt back down during times of peace and economic growth.