MAJORITY

• 0PATRICK VINCENT MCNAMARA

  [D] MI, United States
• 2Jennings Randolph

  [D] WV, United States
• 0STEPHEN MARVIN YOUNG

  [D] OH, United States
• 4Edmund Muskie

  [D] ME, United States
• 0ERNEST GRUENING

  [D] AK, United States
• 0FRANK EDWARD MOSS

  [D] UT, United States
• 0LEE METCALF

  [D] MT, United States
• 1Benjamin Jordan

  [D] NC, United States
• 0DANIEL BAUGH BREWSTER

  [D] MD, United States

  Ended 08/10/1964
• 521Daniel K. Inouye

  [D] HI, United States
• 26Birch Bayh

  [D] IN, United States
• 13Gaylord Nelson

  [D] WI, United States

MINORITY

• 0JOHN SHERMAN COOPER

  [R] KY, United States

  Ended 01/15/1965
• 0HIRAM LEONG FONG

  [R] HI, United States

  Ended 01/15/1965
• 0JAMES CALEB BOGGS

  [R] DE, United States

  Ended 01/15/1965
• 0JACK MILLER

  [R] IA, United States

  Ended 01/15/1965
• 0JAMES B. PEARSON

  [R] KS, United States

  Ended 01/15/1965

OTHER

• 0PIERRE SALINGER

  [D] CA, United States

  Began 08/10/1964

  Ended 12/31/1964