File charges against the 47 U.S. Senators in violation of The Logan Act in attempting to undermine a nuclear agreement is the Whitehouse petition that is gathering the signatures. It has over 260,000 as I write this post.  It only needed 100,000 signatures within 30 days to cross the second threshold and require a response.  April 8 is the deadline.

The concluding sentence:

This is a clear violation of federal law. In attempting to undermine our own nation, these 47 senators have committed treason.

may be a little overdone, but  if you want your signature to really count, then I think this is the petition to sign.