| Democrat | Republican |
| Joseph I. Lieberman Chairman (ID) (CT) | Susan M. Collins Ranking Member (ME) |
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| Carl Levin (MI) | Tom Coburn (OK) |
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| Daniel K. Akaka (HI) | John McCain (AZ) |
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| Thomas R. Carper (DE) | George V. Voinovich (OH) |
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| Mark L. Pryor (AR) | John Ensign (NV) |
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| Mary L. Landrieu (LA) | Lindsey Graham (SC) |
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| Claire McCaskill (MO) | Robert F. Bennett (UT) |
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| Jon Tester (MT) | |
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| Roland Burris (IL) | |
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| Paul G. Kirk, Jr. (MA) |