Count 1: 18 U.S.C. § 371 (Conspiracy to Defraud United States)
Here the indictment's introduction alleges that Trump perpetrated:
A conspiracy to to defraud the United States by using dishonesty,
fraud, and deceit to impair, obstruct, and defeat the lawful federal
government function by which the results of the presidential election
are collected, counted, and certified by the federal government, in
violation of 18 U.S.C. § 371.
temporary link to indictment pdf pending finding a better version: https://d3i6fh83elv35t.cloudfront.net/static/2023/08/trump-indictment.pdf
18 U.S.C. § 371 (Cornell Law School Legal Information Institute):
If two or more persons conspire either to commit any offense against
the United States, or to defraud the United States, or any agency
thereof in any manner or for any purpose, and one or more of such
persons do any act to effect the object of the conspiracy, each shall
be fined under this title or imprisoned not more than five years, or
both.
If, however, the offense, the commission of which is the object of the
conspiracy, is a misdemeanor only, the punishment for such conspiracy
shall not exceed the maximum punishment provided for such misdemeanor.