If you can make a visit to his office, that probably carries more weight than an email, a dino letter, or even a phone call. Don’t get yourself arrested though. Unless you want to. You could go in there and denounce the commies with everything you’ve got... alert the media before you do it... get dragged out for the six o’clock news. Have a friend make a cell phone video for protection. You could be a hero!
I probably won't do that. But I will dig up this news story tonight and send out an email.
I know people that interact with both the Harkin and Grassley staffers. They speak of a very sharp contrast amongst the staffers and attitudes for each Senator's office.