Don’t bother blocking international election monitors, though.
There’s already been a team of them who came to the US,
took one look at how polling places operate, said, “You people are crazy,” and went back to Europe.
If they think things are crazy in the USA, maybe they ought to take a closer look at their own continent.
I see no problem with exercising sovereignty by denying entry to foreign investigators and fully agree with you on election monitors. It would make sense to tone down on investigating foreigners unless their actions directly hurt Americans though. And if they don’t want to see foreign election monitors it makes sense to keep out from foreign elections too.