Read this excerpt from the text about the borrowing power of Congress."Congress has put a statutory ceiling on the public debt, however. The public debt is all of the money borrowed by the Federal Government over the years and not yet repaid, plus the accumulated interest on that money. That legal ceiling has never amounted to much more than a political gesture, however. Congress regularly raises the limit whenever the debt threatens to overtake it. The public debt is approximately $16 trillion." What is the BEST explanation of the debt ceiling?