There are settled court cases that should cover this kind of situation. I’m sure there are witnesses and a paper trail. The problem is whether there’s any interest in actually pursuing a conviction.

He claimed to negotiate and just generally be there in the name of the US. Who cares about a president? We have lots of people that operate in an official capacity to other countries that aren’t remotely close to the president. You simply cannot state you are operating with US authority in foreign relations unless you are specifically authorized.

Just like it says: Rodman went in an official capacity but wasn’t given the authority. He did it on his own. It wasn’t officially sanctioned so he either lied or was just oblivious.