On May 1 approx 35 immigrant advocates, including a nun and Congressman Luis Gutierrez of Illinois and many young people were handcuffed and arrested at the Immigration Reform Rally in front of the White House.
More info about the DC Rally here.
More info about the rallies that took place around the USA on May 1 here.

To thank Rep Guiterrez call his Capitol Hill office at 202-225-8203 and leave a message for him with the staffer who answers the phone. I just did.