From the Summary: "The Constitution grants Congress the power to borrow money on the credit of the United States--one part of its power of the purse--and thus mandates that Congress exercise control over federal debt. Control of debt policy has at times provided Congress with a means of raising concerns regarding fiscal policies. Debates over federal fiscal policy have been especially animated in the past decade, in part because of the accumulation of federal debt in the wake of the 2007-2008 financial crisis and subsequent recession. Rising debt levels, along with continued differences in views of fiscal policy, led to a series of contentious debt limit episodes in recent years. The most recent suspension of the debt limit lapsed after March 1, 2019. The limit was then reset at $21.988 trillion, a level that accommodates federal obligations incurred during the suspension period. U.S. Treasury Secretary Steven Mnuchin invoked extraordinary authorities on March 4, 2019. CBO [Congressional Budget Office] estimated that Treasury could meet federal obligations until just before or just after October 1, 2019. One private estimate suggests Treasury could cover federal payments until at least mid-August or even early October. Such estimates are subject to considerable uncertainty."
CRS Report for Congress, R43389
Congressional Research Service: https://crsreports.congress.gov/