Rep Robert Brady has said that he will draft legislation to do just that.
In an interview on CNN, Robert Brady (D-Penn) said he wants to make it a federal crime to use threatening language or symbols against federal officials.There are already so many laws providing special protections to members of congress, this particular law would do nothing but provide incumbents a cudgel to any rival that might dare to challenge. After all, what is 'threatening language or symbols'? It's up for interpretation I guess.