After all, they all act in one degree or the other with government authority.
The only way the Logan Act can be made to fit the Nancy woman is if we adopt the UK or Canadian use of the word "government" as if we had a parliamentary system.
I'm not sure anyone wants to start calling the Speaker of the House and her minions "the government". After all, George Bush would no longer be free to engage in diplomacy without the approval of the House of Representatives.
Title 18 § 953. Private correspondence with foreign governments
Any citizen of the United States, wherever he may be, who, without authority of the United States, directly or indirectly commences or carries on any correspondence or intercourse with any foreign government or any officer or agent thereof, with intent to influence the measures or conduct of any foreign government or of any officer or agent thereof, in relation to any disputes or controversies with the United States, or to defeat the measures of the United States, shall be fined under this title or imprisoned not more than three years, or both.
This section shall not abridge the right of a citizen to apply, himself or his agent, to any foreign government or the agents thereof for redress of any injury which he may have sustained from such government or any of its agents or subjects.