Here is what I wrote them:

I write you today in disgust. I recently reviewed H.R. 45: Blair Holt's
Firearm Licensing and Record of Sale Act of 2009 sponsored by Rep. Bobby
Rush. After reviewing the details of the bill, if this were to pass you
will have millions of hard working honest Americans become felons. I am
appalled something of this nature can even be written by an elected
official let alone be considered. I am sure you will not even come close
to considering this bill as you are my elected official. Americans are
having problems with money, having problems keeping a roof over their
heads and this kind of legislation should be laughed at. Bobby Rush
should be removed of office for such a ridiculous bill.

I ask you as my elected official to respond back to me and assure me you
will not consider H.R. 45 and will fight to make sure this bill is tossed
out. I appreciate your hard work and dedication to act for the people who
elected you.