Daily debt calculations jump and fall, and big shifts are common. But all three of the biggest one-day debt increases have occurred under the tenure of President Obama, and all of the top six have been in the past two years - an indication of just how quickly the pace of deficit spending has risen under Mr. Obama and President George W. Bush.

"What matters is the overall trend line, and the overall trend line is shooting up," said Robert Bixby, executive director of the Concord Coalition, a bipartisan deficit watchdog group, who said it is one more reason for a fiscal wake-up call.