Shut down the Federal Reserve and have them write down the $4 Trillion+ in Federal Bonds they own.
End Social Security and write down their $5 Trillion of US Debt. Pay the poorest seniors greatly reduced rates direct from budget on declining basis and tell the US Population - “you should have never trusted your Federal Government in the first place.”
Negotiate a hair-cut on remainder of debt with Chinese, Japanese, etc...
With end the Federal Reserve, return to gold-standard which would simply make long-term, structural deficits impossible.
U.S. Federal debt is constitutionally obligated. I agree that the sophistry of intra-governmental borrowing could be eliminated. I would like to imagine that Trump was Jackson incarnate, and the bank (the Fed) would be destroyed, but I'm not going to hold my breath on that. ALL the monied interests would oppose it, and Trump would probably meet a bullet first.