Disinfo? We've got plenty, thanks1
I know there are people out there who's jobs depend on finding the Threat Du Jour but, seriously, what on Earth can a typical Iranian come up with that's not already been chewed over and either digested or spat out already? It would have to be (to quote the Frogstar Scout Robot Class 'D') "Something Pretty Damn Devastating".
The biggest threat by far to elections in the US comes from ourselves, from the GoP (Repuiblicans), who despite ample evidence to the contrary are still pushing the crooked election narrative -- filing lawsuits against election officials, purging voter lists, finding new and improved ways to invalidate postal ballots, finding ever more creative ways to make voting more difficult for the untermensch and so on. The efforts are untiring - and are well documented. For all I know planting stories about how Iranians' dark and dirty deeds (or is the Chinese?) are corrupting our elections may be just another plank in their never ending electoral Jenga game.
Incidentally, if you want to see how to 'meddle' in our elections check out our friends at AIPAC.......as ever, the most blatant practitioners aren't hidden in plain sight, they're not even hidden!