Nothing. All he has is distorted talking points. Notice in his posts and his link that he gets to the conclusion of a surplus by Clinton, not by over all debt standing but by "debt held by public" in one argument, and then "debt as % of GDP" in the next.
Fact is the overall National Debt has has NEVER had a year over year decrease since 1953 or 1954. If you add to your debt, there is no conceivable way to have a surplus.