The AP and others report that the US Director of National Intelligence yesterday said that threatening emails received by voters in several states were the work of Iranian threat actors. Both KnowBe4 and Proofpoint have published discussions of the emails. The text looked much like that found in sextortion phishing, except in this case the threat conveyed was that the attackers knew who the voters were, where they lived, and would visit them with violence if they didn't vote for President Trump.
The senders claimed to represent the Proud Boys, a white supremacist fringe group, but that claim was quickly disavowed and debunked. The threat the emails conveyed is also no more credible than the threats conveyed by their sextortion models. Their intent appears to have been disruptive. Whatever Tehran takes its interests to be, as Defense One notes, the reelection of President Trump is unlikely in the extreme to figure among them.
The Wall Street Journal says the DNI also announced that Russia had also obtained voter registration data. Such data are in most US jurisdictions freely available matters of public record. Authorities expect to see more use of such information before the election. The Washington Post characterizes the threat as “targeting voter confidence rather than ballots and run on the cheap, probably with publicly available data.”
TASS is authorized to disclose that accusations of misconduct in cyberspace leveled against the Russian government in general and the GRU in particular are not only baseless, but amount to "blatant Russophobia."