The $804 billion projected deficit for the current fiscal year is $242 billion larger than what the budget office had expected in June. In addition, the budget office now projects a cumulative deficit of $11.7 trillion over the next decade, an increase of $1.6 trillion from last June’s projection for that time period.

By 2023, according to the budget office, interest costs are projected to exceed what the government spends on the military. By 2028, interest payments will reach $915 billion, more than triple the interest costs last year.

The government’s mounting debt has seemed of little consequence on Capitol Hill in recent months as Republicans in Congress passed a sweeping package of tax cuts. But in a sign that Republicans are growing concerned about the political liability of soaring deficits, the House will vote Thursday on a constitutional amendment to require balanced budgets.

Representative Jeff Duncan, a conservative Republican from South Carolina, took to Twitter to say, “To every House Democrat on social media today complaining about the debt and deficit for the first time: I look forward to seeing you vote for the balanced budget amendment later this week. That is of course assuming you are actually serious about addressing our debt.”

Since such constitutional amendments require two-thirds of the House and Senate to agree, it is unlikely to pass Congress, let alone be ratified by the states.

But the flurry of recent legislation is making it difficult for Republicans to continue blaming President Barack Obama and Democrats for the government’s fiscal condition.

This year, lawmakers approved a two-year budget deal that raised strict caps on military and domestic spending by a total of about $300 billion. That deal paved the way for Congress to pass a $1.3 trillion spending bill last month.