National debt grows $1 million a minute

"The government is in the same predicament as the average homeowner who took out an adjustable mortgage," said Stanley Collender, a former congressional budget analyst and now managing director at Qorvis Communications, a business consulting firm.

Much of the recent borrowing has been accomplished through the selling of shorter-term Treasury bills. If these loans roll over to higher rates, interest payments on the national debt could soar. Furthermore, the decline of the dollar against other major currencies is making Treasury securities less attractive to foreigners — even if they remain one of the world's safest investments.

For now, large U.S. trade deficits with much of the rest of the world work in favor of continued foreign investment in Treasuries and dollar-denominated securities. After all, the vast sums Americans pay — in dollars — for imported goods has to go somewhere. But that dynamic could change.

"The first day the Chinese or the Japanese or the Saudis say, `we've bought enough of your paper,' then the debt — whatever level it is at that point — becomes unmanageable," said Collender.

A recent comment by a Chinese lawmaker suggesting the country should buy more euros instead of dollars helped send the Dow Jones plunging more than 300 points.

The dollar is down about 35 percent since the end of 2001 against a basket of major currencies.

Foreign governments and investors now hold some $2.23 trillion — or about 44 percent — of all publicly held U.S. debt. That's up 9.5 percent from a year earlier.

Japan is first with $586 billion, followed by China ($400 billion) and Britain ($244 billion). Saudi Arabia and other oil-exporting countries account for $123 billion, according to the Treasury.

"Borrowing hundreds of billions of dollars from China and OPEC puts not only our future economy, but also our national security, at risk. It is critical that we ensure that countries that control our debt do not control our future," said Sen. George Voinovich of Ohio, a Republican budget hawk.

Of all federal budget categories, interest on the national debt is the one the president and Congress have the least control over. Cutting payments would amount to default, something Washington has never done.

MORE FROM STOCKS & ECONOMY

Stocks & economy Section Front

Stocks end big day at highs for the year Oil prices top $80 as dollar weighs on markets Aging bull? Stocks may be in for rough ride Wall Street awaits stores’ reports this week Cost of gas nudges up 2 cents in last two weeks Jobless: 10 percent is tougher than it used to be Easing job losses point to wobbly recovery Unemployment rate rises above 10 percent When unemployment last topped 10 percent Obama signs homebuyer, jobless bill assistance Stocks & economy Section Front   Add Stocks & economy headlines to your news reader: