Well you can't actually bring charges against someone in office because it would completely stop the government
Donny's right
Well no, he's not. The president is another citizen of the US, regardless of status. If there was overwhelming evidence of a serious crime, yes the president can be arrested, but as far as I'm aware that's pretty much never happened and it would be handled a lot differently than for an ordinary citizen.
But this wouldn't be something like trying to charge Donald with assault, this would be suing for damages, to which the court ruled that yes, he can be sued. Whether or not they'll follow through is a different story.