If the Total US Debt is reduced by a million dollars per minute it will take 104 years to pay off. Based on my completely amateur observations I determined the following by watching http://www.usdebtclock.org/#

U.S. National Debt +
U.S. Federal Tax Revenue +
U.S. Income Tax +
Payroll Tax +
State Revenue +
State Debt +
Local Revenue +
Local Debt +
U.S. Federal Spending +
U.S. Federal Budget Deficit +
Medicare/Medicaid +
Social Security +
Federal Pensions +
Defense/Wars +
Interest on Debt +
Earmarks +
U.S. Gross Domestic Product +++
U.S. Total Interest +
U.S. Total Debt -
Total Personal Debt -
Mortgage Debt -
Consumer Debt -
Credit Card Debt -
Federal Reserve Monetary Base -
Currency and Credit Derivatives +++++
U.S. Government Bailouts -
Personal Savings -
U.S. Debt Held By Foreign Countries +
U.S. Trade Deficit +
U.S. Trade Deficit with China +
Imported Oil +
Small Business Assets -
Corporation Assets -
Household Assets+++
Total National Assets ++
Social Security Liability +
Prescription Drug Liability +
Medicare Liability +
U.S. Unfunded Liabilities ++