Treasury Secretary Steve Mnuchin may soon have a familiar problem on his hands: The debt ceiling. The government hit its (theoretical) borrowing limit earlier this year -- when it returned from a legislated hiatus -- and now needs to be lifted for the U.S. to issue more debt.

In years past, we would likely see hyperbolic headlines aplenty as of now. But interestingly, the media commentary this time around has a different flavor: We've seen a raft of editorials arguing for the debt ceiling to go the way of the dodo. Seems like a good idea to us! The debt ceiling has always been symbolic. It doesn't actually limit debt (which isn't a problem anyway) in practice, and failure to raise it doesn't do all the terrible things people fear it will. Might as well formally acknowledge it is an annoying heap of nothingness.

In the old days, Congress had to authorize every new debt increase. It worked for a while, but then a little thing called World War I happened, and Uncle Sam needed to mobilize. To speed the war effort, Congress allowed the Treasury to issue new debt at its discretion, without going to lawmakers for approval, as long as debt stayed below a certain amount. When debt reached whatever arbitrary limit they set, they'd simply raise it, and everyone would carry on as usual. The U.S. did not borrow itself into oblivion, the Allies won the war, and all was good.

For a few decades, raising the debt ceiling was a boring procedural matter. But in the mid-20th century, politicians -- ever the politickers -- figured out voters weren't big on debt, and that positioning themselves as anti-debt crusaders allowed them to use the debt "limit" as a tool to win concessions.

And thus began the time-honored tradition of holding the debt ceiling hostage to use as a bargaining chip in other fights. Both parties -- and pretty much all factions within them -- are guilty of this, and we suspect you aren't invited to the "cool" parties on Capitol Hill until you can claim responsibility for setting off a debt ceiling fight. As a result, almost every time it comes around, we are all treated to a political circus. And when everyone is satisfied with whatever symbolic victory they can peddle to their constituents and lobbyist friends, they kick the can and go home.

This wouldn't be so annoying if, every time this boomerang comes around, they didn't make all those dire warnings about default. You know, "If we don't raise the debt ceiling, the Treasury won't be able to pay its bills, and we'll default and destroy America's creditworthiness and it will be the end of us, we tell you, the END!"

If that statement were actually accurate, it would be one thing, but it isn't. In this context, "the Treasury won't be able to pay its bills" means "the Treasury will have to give IOUs to vendors, contractors and government pension plans." But Uncle Sam's failing to pay the cable guy for a month isn't a default. Default means one thing, and one thing only: failing to make principal or interest payments on government debt. That's it.

Failing to lift the debt ceiling will not force America to default. Actually, most evidence suggests it can't. The 14th Amendment, as interpreted by the Supreme Court, requires America to pay its debts above all else. As long as the Treasury has money coming in, it can't say "well, sorry, can't pay the interest this month, we gotta pay the cable guy instead."

Repaying principal when debt matures is easy: Hitting the debt ceiling doesn't preclude the Treasury from issuing new bonds to replace maturing ones. Those cancel. So the key question is, does monthly tax revenue cover interest payments? The answer, as Exhibit 1 shows, is yes: Monthly revenues are so far above monthly interest payments that the Treasury can cover bondholders, pay all Social Security and Medicare benefits, and still have plenty left over other expenses (though they might stiff the cable guy in order to pay civil servants).

Exhibit 1: Monthly Tax Revenue Dwarfs Interest Payments

Source: US Treasury, as of 6/28/2017. Due to some accounting quirks, the Treasury reported paying -$17 billion in interest in September 2016, which would look very weird on a chart, so we chose to display it as zero.

Deleting the debt ceiling won't change anything for the U.S. economy or fiscal situation. It might, however, improve sentiment by removing a regular source of uncertainty. After all, when Congress's debt ceiling fighting (and a math error) inspired Standard & Poor's to downgrade America's credit rating in 2011, it didn't change a thing (interest rates fell, which tells you all you need to know), but the world collectively freaked out. It's probably fair to say it was a contributing factor to that summer's stock market correction -- sentiment is the driving force of such sharp, fast moves. We favor relieving investors of one source of angst.

But we aren't holding our breath or anything. While sentiment seems to be drifting in favor of throwing the debt ceiling out, politicians really seem to like it. They are generally loath to surrender anything they think they can use to score points. So we're mostly resigned to living with it. But still, wouldn't it be nice?

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