In a sane world, you should be able to prosecute RFK for making or repeating lies. They would claim a defence that they were misinformed and not an expert in the field.
The precidence that needs to be set is that if you are appointed to a position of responsibility you are then automatically considered qualified in that field for the purpose of law.
Its either that, or break out the guillotines
Translation:
Trump is raising taxes on Americans so he can