The debt ceiling, as a concept, is unconstitutional, has always been.
The 14th amendment was drafted with language to make sure, when the South rejoined the union, the Congress could not stop payment on money already spent fighting the Civil War. It says that a new Congress did not have the authority to hold back from a President money that he has been directed to spend by the last Congress.
The debt ceiling was created during WWI due to the Congress at the time feeling as if they needed a better check on a President’s power to spend and borrow money. WWI was hugely expensive, as the bills came in and the Executive branch was running around borrowing money to fight it, the Congress got nervous.
The debt ceiling is unconstitutional. It has never been tested; each new Congress found it convenient to just raise it. If the debt ceiling was ever looked at in court, it would be found unconstitutional and the Congress would lose that tool to control the president.
The President of the United States runs agencies as he has been told to by Congress. A new Congress not allowing the president to borrow money the last Congress directed him to spend is exactly what the 14th amendment protects from.
And I probably made capitalization errors all through that answer.