Sleezy?
It’s illegal.
I’m not sure it is illegal, but I’m not a lawyer. FBI asked someone with a key to let them in, and they complied.
If the police knock on your door and ask to come in, and you let them in, they haven’t done anything illegal with their entry.
Now the man could have felt pressured by the FBI and thus it wasn’t totally voluntary. We don’t have that info.
Doesn’t matter to Dems. They do as they please. Sessions won’t stop them.