| SC | | R | Jim DeMint | 1 | 100% | 100% | |
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| OK | | R | Tom Coburn | 1 | 100% | 97% | |
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| AZ | | R | Jon Kyl | 3 | 97% | 95% | |
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| TX | | R | John Cornyn | 3 | 97% | 88% | |
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| AZ | | R | John McCain | 3 | 97% | 83% | |
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| UT | | R | Orrin Hatch | 3 | 97% | 75% | |
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| KS | | R | Sam Brownback | 7 | 96% | 87% | |
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| AL | | R | Jeff Sessions | 8 | 94% | 87% | |
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| SD | | R | John Thune | 8 | 94% | 82% | |
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| TN | | R | Bob Corker | 8 | 94% | 78% | |
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| OK | | R | James Inhofe | 11 | 93% | 93% | |
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| KS | | R | Pat Roberts | 12 | 92% | 75% | |
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| ID | 00 | R | Jim Risch | 13 | 92% | 93% | |
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| GA | | R | Saxby Chambliss | 13 | 92% | 86% | |
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| UT | | R | Robert Bennett | 15 | 91% | 77% | |
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| KY | | R | Mitch McConnell | 16 | 90% | 85% | |
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| NC | | R | Richard Burr | 17 | 89% | 87% | |
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| KY | | R | Jim Bunning | 18 | 89% | 89% | |
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| AL | | R | Richard Shelby | 18 | 89% | 75% | |
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| LA | | R | David Vitter | 20 | 89% | 84% | |
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| TX | | R | Kay Hutchison | 21 | 89% | 72% | |
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| NV | | R | John Ensign | 22 | 89% | 92% | |
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| WY | | R | John Barrasso | 22 | 89% | 91% | |
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| FL | | R | George LeMieux | 24 | 88% | 88% | |
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| MO | | R | Christopher Bond | 25 | 87% | 68% | |
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| NE | | R | Mike Johanns | 26 | 87% | 91% | |
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| ID | | R | Mike Crapo | 26 | 87% | 79% | |
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| GA | | R | Johnny Isakson | 28 | 86% | 82% | |
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| SC | | R | Lindsey Graham | 29 | 85% | 76% | |
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| MS | 00 | R | Roger Wicker | 29 | 85% | 72% | |
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| WY | | R | Michael Enzi | 31 | 83% | 89% | |
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| MS | | R | Thad Cochran | 32 | 81% | 72% | |
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| TN | | R | Lamar Alexander | 33 | 78% | 69% | |
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| NH | | R | Judd Gregg | 34 | 76% | 82% | |
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| IA | | R | Chuck Grassley | 35 | 76% | 76% | |
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| AK | | R | Lisa Murkowski | 36 | 71% | 64% | |
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| IN | | R | Richard Lugar | 37 | 70% | 63% | |
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| OH | | R | George Voinovich | 38 | 63% | 54% | |
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| MA | | R | Scott Brown | 39 | 61% | 62% | |
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| ME | | R | Susan Collins | 40 | 51% | 35% | |
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| NE | | D | E. Benjamin Nelson | 41 | 50% | 32% | |
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| ME | | R | Olympia Snowe | 42 | 49% | 26% | |
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| AR | | D | Blanche Lincoln | 43 | 37% | 17% | |
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| IN | | D | Evan Bayh | 44 | 35% | 14% | |
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| AR | | D | Mark Pryor | 45 | 29% | 15% | |
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| WI | | D | Russ Feingold | 46 | 27% | 12% | |
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| MO | | D | Claire McCaskill | 47 | 18% | 16% | |
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| WA | | D | Maria Cantwell | 48 | 15% | 14% | |
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| FL | | D | Bill Nelson | 49 | 13% | 13% | |
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| CT | | I | Joseph Lieberman | 50 | 12% | 8% | |
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| VA | | R | John Warner | 51 | 10% | 12% | |
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| CO | | D | Mark Udall | 52 | 10% | 8% | |
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| MT | | D | Jon Tester | 53 | 9% | 16% | |
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| VA | | D | Jim Webb | 54 | 8% | 9% | |
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| MT | | D | Max Baucus | 55 | 8% | 13% | |
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| CO | 00 | D | Michael Bennet | 55 | 8% | 10% | |
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| DE | | D | Edward Kaufman | 57 | 6% | 5% | |
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| NC | | D | Kay Hagan | 58 | 6% | 6% | |
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| WI | | D | Herb Kohl | 59 | 6% | 7% | |
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| OR | | D | Ron Wyden | 60 | 5% | 9% | |
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| SD | | D | Tim Johnson | 61 | 5% | 12% | |
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| DE | | D | Thomas Carper | 61 | 5% | 9% | |
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| CA | | D | Dianne Feinstein | 61 | 5% | 6% | |
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| HI | | D | Daniel Akaka | 61 | 5% | 3% | |
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| WV | | D | John Rockefeller | 65 | 4% | 4% | |
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| LA | | D | Mary Landrieu | 66 | 4% | 16% | |
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| NM | | D | Jeff Bingaman | 67 | 3% | 7% | |
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| AK | | D | Mark Begich | 67 | 3% | 5% | |
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| PA | | D | Robert Casey | 67 | 3% | 2% | |
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| MN | | D | Amy Klobuchar | 70 | 2% | 5% | |
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| OR | 00 | D | Jeff Merkley | 70 | 2% | 1% | |
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| ND | | D | Kent Conrad | 72 | 100% | 24% | |
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| NM | | D | Tom Udall | 72 | 100% | 5% | |
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| MI | | D | Debbie Stabenow | 72 | 100% | 5% | |
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| NJ | | D | Robert Menendez | 72 | 100% | 3% | |
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| PA | | D | Arlen Specter | 100 | 0% | 33% | |
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| ND | | D | Byron Dorgan | 100 | 0% | 8% | |
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| NV | | D | Harry Reid | 100 | 0% | 6% | |
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| NY | 00 | D | Kirsten Gillibrand | 100 | 0% | 6% | |
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| VT | | I | Bernie Sanders | 100 | 0% | 6% | |
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| WA | | D | Patty Murray | 100 | 0% | 6% | |
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| NH | 00 | D | Jeanne Shaheen | 100 | 0% | 5% | |
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| MD | | D | Benjamin Cardin | 100 | 0% | 5% | |
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| RI | | D | Sheldon Whitehouse | 100 | 0% | 5% | |
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| MI | | D | Carl Levin | 100 | 0% | 4% | |
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| NJ | | D | Frank Lautenberg | 100 | 0% | 4% | |
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| OH | | D | Sherrod Brown | 100 | 0% | 4% | |
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| RI | | D | Jack Reed | 100 | 0% | 4% | |
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| HI | | D | Daniel Inouye | 100 | 0% | 4% | |
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| VT | | D | Patrick Leahy | 100 | 0% | 3% | |
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| MD | | D | Barbara Mikulski | 100 | 0% | 3% | |
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| CT | | D | Christopher Dodd | 100 | 0% | 3% | |
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| MA | | D | John Kerry | 100 | 0% | 3% | |
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| IL | | D | Roland Burris | 100 | 0% | 2% | |
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| CA | | D | Barbara Boxer | 100 | 0% | 2% | |
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| NY | | D | Chuck Schumer | 100 | 0% | 2% | |
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| IL | | D | Dick Durbin | 100 | 0% | 2% | |
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| IA | | D | Tom Harkin | 100 | 0% | 1% | |
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| MN | | D | Al Franken | 100 | 0% | 0% | |
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| WV | | D | Carte Goodwin | n.a. | n.a. | n.a. | |
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| DE | 00 | D | Chris Coons | n.a. | n.a. | n.a. | |
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| IL | | R | Mark Kirk | n.a. | n.a. | n.a. | |
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| WV | | D | Joe Manchin | n.a. | n.a. | n.a. | |
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| WV | | D | Robert Byrd | n.a. | n.a. | 0% | |
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| MA | | D | Paul Kirk | n.a. | n.a. | 0% | |
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