Typically, the deficit shrinks during strong economic times, as the need for costly government support wanes and tax revenue rises. In 2000, the last time the unemployment rate was at its current level of 3.9 percent, the government ran a surplus, meaning tax revenue eclipsed all spending.

The dynamic is much different now.

Corporate tax receipts fell 30 percent in the past 11 months, the CBO said, precipitated by the large reduction in rates from the massive tax overhaul passed by Congress last year. Spending levels have risen sharply as a result of a bipartisan agreement to shed budget caps put in place to maintain fiscal discipline and pour more money into both military and domestic programs.

“It’s not just irresponsible, it’s wildly irresponsible,” said retired senator Kent Conrad (D-N.D.), who added that lawmakers are pushing the deficit higher because of political expediency.