Our federal government is borrowing $4 billion a day to pay the bills. Multiply that by 365 days, that's $1.46 trillion. If we keep Barack Obama as president and spend at the current pace for four years, that's $5.84 trillion more debt. Add that to the $16 trillion we owe and the hypothetical national debt comes to $21.68 trillion. Then we can't afford the interest on the debt.