The U.S. was stripped of its top-tier sovereign credit grade by Fitch Ratings, which criticized the country’s ballooning fiscal deficits and an "erosion of governance” that’s led to repeated debt limit clashes over the past two decades.

The credit grader cut the U.S. one level from AAA to AA+, echoing a move made more than a decade ago by S&P Global Ratings. Tax cuts and new spending initiatives coupled with multiple economic shocks have swelled budget deficits, Fitch said, while medium-term challenges related to rising entitlement costs remain largely unaddressed.

"The rating downgrade of the United States reflects the expected fiscal deterioration over the next three years, a high and growing general government debt burden, and the erosion of governance relative to ‘AA’ and ‘AAA’ rated peers over the last two decades,” Fitch said in a statement.