Here’s a startling example: on October 27, 2020, the Treasury department issued around $50 billion worth of 2-year Treasury Notes at a yield of just 0.12%.Well, now it’s two years later, and those 2-year Treasury Notes are about to mature. So the government is going to have to issue a new $50 billion batch of bonds to pay off the maturing debt.The problem is that interest rates have risen a LOT since 2020. The 2-year Treasury yield is now 4.2%, and rising. In other words, the new $50 billion issuance will cost the government an additional $2 billion per year in interest ($50 billion x 4%).Now imagine this problem for the ENTIRE $31 trillion national debt.