In the Current (112th) Congress:


The Alzheimer's Breakthrough Act (H.R. 1897) was reintroduced in the House of Representatives by Congressman Chris Smith (R-NJ) and Edward Markey (D-MA).  It has not yet been reintroduced in the Senate. 
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112th Congress Cosponsors:

AR02 Representative Tim Griffin
AR03 Representative Steve Womack
AR04 Representative Mike  Ross
CA05 Representative Doris Matsui
CA06 Representative Lynn Woolsey
CA07 Representative George Miller
CA09 Representative Barbara Lee
CA10 Representative John Garamendi
CA14 Representative Anna G. Eshoo
CA23 Representative Lois Capps
CA24 Representative Elton Gallegly
CA27 Representative Brad Sherman
CA28 Representative Howard Berman
CA35 Representative Maxine Waters
CA40 Representative Edward Royce
CA42 Representative Gary Miller
CA44 Representative Ken Calvert
CA47 Representative Loretta Sanchez
CA51 Representative Bob Filner
CO01 Representative Diana DeGette
CO07 Representative Ed Perlmutter
CT01 Representative John Larson
CT02 Representative Joe Courtney
CT05 Representative Christopher S. Murphy
DC Representative Eleanor Holmes Norton
DE01 Representative John Carney
FL11 Representative Katherine Castor
FL19 Representative Theodore Deutch
FL21 Representative Mario Diaz-Balart
FL23 Representative Alcee Hastings
GA04 Representative Henry C. "Hank" Johnson
GA05 Representative John Lewis
GA12 Representative John Barrow
HI02 Representative Mazie K. Hirono
IA01 Representative Bruce L. Braley
IA02 Representative David Loebsack
IA03 Representative Leonard L. Boswell
IA04 Representative Tom Latham
IL02 Representative Jesse L. Jackson, Jr.
IL05 Representative Michael Quigley
IL13 Representative Judy Biggert
IL18 Representative Aaron Schock
KY06 Representative Ben Chandler
MA03 Representative James McGovern
MA04 Representative Barney Frank
MA05 Representative Niki Tsongas
MA06 Representative John F. Tierney
MA07 Representative Edward J. Markey
MA08 Representative Michael E. Capuano
MA09 Representative Stephen Lynch
MA10 Representative William Keating
MC03 Representative John Sarbanes
MD06 Representative Roscoe Bartlett
MD07 Representative Elijah Cummings
MD08 Representative Chris VanHollen
ME02 Representative Michael H. Michaud
MI08 Representative Mike Rogers
MN02 Representative John Kline
MN03 Representative Erik Paulsen
MN05 Representative Keith M. Ellison
MN07 Representative Collin C. Peterson
MO03 Representative Russ Carnahan
MO04 Representative Vicky Hartzler
NC06 Representative Howard Coble
NC08 Representative Larry Kissell
ND01 Representative Rick Berg
NH01 Representative Frank Guinta
NJ02 Representative Frank LoBiondo
NJ03 Representative Jon Runyan
NJ04 Representative Christopher H.  Smith
NJ09 Representative Steven R. Rothman
NJ10 Representative Donald Payne
NJ11 Representative Rodney P. Frelinghuysen
NJ13 Representative Albio Sires
NY01 Representative Timothy H. Bishop
NY02 Representative Steve Israel
NY03 Representative Peter T. King
NY04 Representative Carolyn McCarthy
NY05 Representative Gary L. Ackerman
NY10 Representative Edolphus Towns
NY12 Representative Nydia M. Velazquez
NY14 Representative Carolyn B. Maloney
NY15 Representative Charles Rangel
OH03 Representative Michael R. Turner
OH09 Representative Marcy Kaptur
OH11 Representative Marcia Fudge
OH12 Representative Patrick Tiberi
OH17 Representative Timothy J. Ryan
OK02 Representative Dan Boren
OR01 Representative David Wu
PA01 Representative Robert Brady
PA04 Representative Jason Altmire
PA06 Representative Jim Gerlach
PA11 Representative Lou Barletta
PA12 Representative Mark Critz
PA13 Representative Allyson Y. Schwartz
PA14 Representative Michael F. Doyle
PA15 Representative Charles Dent
PA17 Representative Tim Holden
PA19 Representative Todd Russell   Platts
RI01 Representative David N. Cicilline
SC02 Representative Joe Wilson
TN05 Representative Tim Cooper
TN09 Representative Stephen I. Cohen
TX02 Representative Ted Poe
TX16 Representative Silvestre Reyes
TX20 Representative Charles Gonzalez
TX26 Representative Michael C. Burgess
TX31 Representative John R. Carter
TX32 Representative Pete Sessions
VA08 Representative James P. Moran
VA10 Representative Frank R. Wolf
VT Representative Peter Welch
WV02 Representative Shelley Moore Capito
WV03 Representative Nick Rahall
WI04 Representative Gwen Moore
WI06 Representative Thomas Petri

*Updated October 12, 2012