Have you contacted your Congressman?
My Congressman cosponsored because of my email to him. Here is my Congressman's response to me:
Urging the president to release information regarding the September 11, 2001, terrorist attacks upon the United States.
Sponsor: Rep Jones, Walter B., Jr. [NC-3] (introduced 1/6/2015)
Cosponsors (28):
Rep Amash, Justin [MI-3] - 12/10/2015
Rep Capuano, Michael E. [MA-7] - 2/5/2015
Rep Clay, Wm. Lacy [MO-1] - 12/10/2015
Rep Conyers, John, Jr. [MI-13] - 1/21/2015
Rep Doggett, Lloyd [TX-35] - 2/11/2015
Rep Duncan, John J., Jr. [TN-2] - 2/12/2015
Rep Gohmert, Louie [TX-1] - 12/18/2015
Rep Graham, Gwen [FL-2] - 4/30/2015
Rep Grayson, Alan [FL-9] - 1/21/2015
Rep Hastings, Alcee L. [FL-20] - 12/9/2015
Rep Honda, Michael M. [CA-17] - 12/9/2015
Rep Lofgren, Zoe [CA-19] - 6/9/2015
Rep Lummis, Cynthia M. [WY] - 3/16/2015
Rep Lynch, Stephen F. [MA-8] - 1/6/2015
Rep Massie, Thomas [KY-4] - 1/6/2015
Rep McGovern, James P. [MA-2] - 12/10/2015
Rep Nolan, Richard M. [MN-8] - 9/10/2015
Rep O'Rourke, Beto [TX-16] - 6/9/2015
Rep Peterson, Collin C. [MN-7] - 2/11/2015
Rep Pocan, Mark [WI-2] - 1/21/2015
Rep Posey, Bill [FL-8] - 2/13/2015
Rep Rohrabacher, Dana [CA-48] - 10/27/2015
Rep Sanford, Mark [SC-1] - 2/11/2015
Rep Scott, Austin [GA-8] - 12/15/2015
Rep Thompson, Bennie G. [MS-2] - 12/17/2015
Rep Welch, Peter [VT] - 2/12/2015
Rep Yarmuth, John A. [KY-3] - 6/15/2015
Rep Yoho, Ted S. [FL-3] - 2/13/2015