what is the standard proof in election fraud cases..criminal case?
Since it’s a federal election it’s Federal Criminal Jurisdiction
Federal criminal jurisdiction over the activities described below can generally be obtained when those activities take place:
In elections where a federal candidate’s name is on the ballot.
In any election (federal or nonfederal), when the fraud involves the necessary participation of an election official acting “under color of law.”
In connection with voter registration. The fact that voter registration is “unitary” in all 50 States (a citizen registers once to become eligible to vote for both federal and nonfederal candidates) confers federal jurisdiction regardless of the type of election.
In connection with the misuse, or unauthorized trespass, involving a computer system used in connection with an election, to the extent that the misuse or trespass is conducted “under color of law.”