The other solution is for the U.S. to reign in all the statutory laws that have dropped the requirement of mens rea. Originally to be criminally guilty you had to have intent and action. Over the last few decades we have been progressing or law system to exclude intent making it possible to be found criminally guilty of crimes you had no intent on breaking. Including a strong default of mends rea in all laws that do not otherwise mention it would allow defendants to use the laws convoluted nature as a valid defense.
P.S. I am not a lawyer and probably completely wrong.
P.S. I am not a lawyer and probably completely wrong.