Senator Tom Cotton met privately with Israeli Prime Minister Benjamin Netanyahu ito discuss their opposition to the international nuclear agreement with Iran in September, 2015.
U.S. Code, Chapter 115, says about treasonous acts, specifically rebellion and insurrection:
“Whoever incites, sets on foot, assists, or engages in any rebellion or insurrection against the authority of the United States or the laws thereof, or gives aid or comfort thereto, shall be fined under this title or imprisoned not more than ten years, or both; and shall be incapable of holding any office under the United States.”
He also sent a mutinous letter to the leaders of Iran:
http://www.cotton.senate.gov/content/cotton-and-46-fellow-senators-send-...