The Socialist Party of America announced in their October 2009 newsletter that 70 Congressional democrats currently belong to their caucus.

This admission was posted on Scribd.com:

    American Socialist Voter-
    Q: How many members of the U.S. Congress are also members of the DSA?
    A: Seventy

    Q: How many of the DSA members sit on the Judiciary Committee?
    A: Eleven: John Conyers [Chairman of the Judiciary Committee], Tammy Baldwin, Jerrold Nadler, Luis Gutierrez,
    Melvin Watt, Maxine Waters, Hank Johnson, Steve Cohen, Barbara Lee, Robert Wexler, Linda Sanchez [there are 23 Democrats on the Judiciary Committee of which eleven, almost half, are now members of the DSA].

    Q: Who are these members of 111th Congress?
    A: See the listing below

    Co-Chairs
    Hon. Raúl M. Grijalva (AZ-07)
    Hon. Lynn Woolsey (CA-06)

    Vice Chairs
    Hon. Diane Watson (CA-33)
    Hon. Sheila Jackson-Lee (TX-18)
    Hon. Mazie Hirono (HI-02)
    Hon. Dennis Kucinich (OH-10)

    Senate Members
    Hon. Bernie Sanders (VT)

    House Members
    Hon. Neil Abercrombie (HI-01)
    Hon. Tammy Baldwin (WI-02)
    Hon. Xavier Becerra (CA-31)
    Hon. Madeleine Bordallo (GU-AL)
    Hon. Robert Brady (PA-01)
    Hon. Corrine Brown (FL-03)
    Hon. Michael Capuano (MA-08)
    Hon. André Carson (IN-07)
    Hon. Donna Christensen (VI-AL)
    Hon. Yvette Clarke (NY-11)
    Hon. William "Lacy" Clay (MO-01)
    Hon. Emanuel Cleaver (MO-05)
    Hon. Steve Cohen (TN-09)
    Hon. John Conyers (MI-14)
    Hon. Elijah Cummings (MD-07)
    Hon. Danny Davis (IL-07)
    Hon. Peter DeFazio (OR-04)
    Hon. Rosa DeLauro (CT-03)
    Rep. Donna F. Edwards (MD-04)
    Hon. Keith Ellison (MN-05)
    Hon. Sam Farr (CA-17)
    Hon. Chaka Fattah (PA-02)
    Hon. Bob Filner (CA-51)
    Hon. Barney Frank (MA-04)
    Hon. Marcia L. Fudge (OH-11)
    Hon. Alan Grayson (FL-08)
    Hon. Luis Gutierrez (IL-04)
    Hon. John Hall (NY-19)
    Hon. Phil Hare (IL-17)
    Hon. Maurice Hinchey (NY-22)
    Hon. Michael Honda (CA-15)
    Hon. Jesse Jackson, Jr. (IL-02)
    Hon. Eddie Bernice Johnson (TX-30)
    Hon. Hank Johnson (GA-04)
    Hon. Marcy Kaptur (OH-09)
    Hon. Carolyn Kilpatrick (MI-13)
    Hon. Barbara Lee (CA-09)
    Hon. John Lewis (GA-05)
    Hon. David Loebsack (IA-02)
    Hon. Ben R. Lujan (NM-3)
    Hon. Carolyn Maloney (NY-14)
    Hon. Ed Markey (MA-07)
    Hon. Jim McDermott (WA-07)
    Hon. James McGovern (MA-03)
    Hon. George Miller (CA-07)
    Hon. Gwen Moore (WI-04)
    Hon. Jerrold Nadler (NY-08)
    Hon. Eleanor Holmes-Norton (DC-AL)
    Hon. John Olver (MA-01)
    Hon. Ed Pastor (AZ-04)
    Hon. Donald Payne (NJ-10)
    Hon. Chellie Pingree (ME-01)
    Hon. Charles Rangel (NY-15)
    Hon. Laura Richardson (CA-37)
    Hon. Lucille Roybal-Allard (CA-34)
    Hon. Bobby Rush (IL-01)
    Hon. Linda Sánchez (CA-47)
    Hon. Jan Schakowsky (IL-09)
    Hon. José Serrano (NY-16)
    Hon. Louise Slaughter (NY-28)
    Hon. Pete Stark (CA-13)
    Hon. Bennie Thompson (MS-02)
    Hon. John Tierney (MA-06)
    Hon. Nydia Velazquez (NY-12)
    Hon. Maxine Waters (CA-35)
    Hon. Mel Watt (NC-12)
    Hon. Henry Waxman (CA-30)
    Hon. Peter Welch (VT-AL)
    Hon. Robert Wexler (FL-19)
DEMOCRATIC SOCIALISTS OF AMERICA