They're really running with the treason angle
Did 47 U.S. Senators Just Commit Treason By Attempting to Sabotage Iran Deal? - Bloomberg Politics
Treason is a serious accusation and this letter is not even close. I'm saying one could argue that it violates the Logan act. I personally don't know, it seems trivial but breaking the law is still breaking the law if that were the case.
Yes. It is a serious charge and as you can see, it has already been leveled against Senate Republicans. Feel free to present your argument against to them.