Calling it a "joke of an indictment," Trump told the audience in Georgia the prosecution would further bolster his support within the party.
The criminal case, brought by the US Department of Justice, amounts to another legal setback for Trump as he seeks to regain the US presidency next year.
Merrick Garland appointed Special Counsel Jack Smith in November to handle the two Trump investigations.
A federal grand jury indicted Lamond, who was arrested on Friday, on one count of obstruction of justice and three counts of making false statements.
Sayfullo Saipov carried out the Halloween terrorist attack in which he deliberately drove a 6,000 pound truck into people on the Hudson River Bike Path in lower Manhattan.
The box primarily contained old presidential schedules with a few classified records among them, according to CNN.
The initiative will be a joint effort between the US Justice and Commerce departments, with a goal of blocking adversaries from "trying to siphon our best technology."
The Justice Department said the defendants have sold thousands of devices known as FRT-15s, that are designed and intended to convert AR-15-style semiautomatic firearms into machine guns.
Some classified documents dated from Biden's tenure as US Senate, where he represented Delaware from 1973 to 2006.