| SC | | R | Jim DeMint | 1 | 100% | 100% | |
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| OK | | R | Tom Coburn | 2 | 95% | 96% | |
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| WY | | R | John Barrasso | 2 | 95% | 88% | |
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| WY | | R | Michael Enzi | 2 | 95% | 87% | |
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| OK | | R | James Inhofe | 5 | 94% | 91% | |
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| KY | | R | Jim Bunning | 6 | 93% | 88% | |
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| CO | | R | Wayne Allard | 7 | 91% | 92% | |
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| LA | | R | David Vitter | 8 | 90% | 82% | |
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| AZ | | R | Jon Kyl | 9 | 90% | 94% | |
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| NV | | R | John Ensign | 10 | 88% | 92% | |
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| ID | | R | Mike Crapo | 11 | 85% | 76% | |
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| AL | | R | Jeff Sessions | 12 | 84% | 81% | |
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| SD | | R | John Thune | 13 | 82% | 74% | |
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| AL | | R | Richard Shelby | 14 | 81% | 70% | |
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| NC | | R | Richard Burr | 15 | 80% | 84% | |
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| KS | | R | Pat Roberts | 16 | 77% | 67% | |
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| MS | | R | Roger Wicker | 17 | 75% | 64% | |
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| KS | | R | Sam Brownback | 18 | 74% | 85% | |
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| TX | | R | John Cornyn | 19 | 74% | 84% | |
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| TN | | R | Bob Corker | 20 | 73% | 67% | |
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| NH | | R | Judd Gregg | 21 | 70% | 85% | |
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| TX | | R | Kay Hutchison | 21 | 70% | 66% | |
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| IA | | R | Chuck Grassley | 23 | 69% | 73% | |
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| UT | | R | Orrin Hatch | 23 | 69% | 66% | |
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| KY | | R | Mitch McConnell | 25 | 67% | 82% | |
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| MS | | R | Thad Cochran | 25 | 67% | 67% | |
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| GA | | R | Saxby Chambliss | 27 | 66% | 81% | |
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| GA | | R | Johnny Isakson | 28 | 63% | 77% | |
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| UT | | R | Robert Bennett | 28 | 63% | 72% | |
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| MO | | R | Christopher Bond | 30 | 59% | 59% | |
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| NE | | R | Chuck Hagel | 31 | 58% | 81% | |
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| TN | | R | Lamar Alexander | 32 | 58% | 68% | |
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| AK | | R | Lisa Murkowski | 33 | 57% | 57% | |
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| NH | | R | John Sununu | 34 | 56% | 83% | |
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| ID | | R | Larry Craig | 35 | 56% | 73% | |
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| IN | | R | Richard Lugar | 36 | 54% | 58% | |
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| NM | | R | Pete Domenici | 38 | 53% | 57% | |
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| SC | | R | Lindsey Graham | 39 | 52% | 73% | |
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| NC | | R | Elizabeth Dole | 40 | 48% | 72% | |
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| AK | | R | Ted Stevens | 41 | 44% | 52% | |
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| FL | | R | Mel Martinez | 42 | 43% | 71% | |
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| OH | | R | George Voinovich | 42 | 43% | 46% | |
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| PA | | R | Arlen Specter | 44 | 39% | 41% | |
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| MN | | R | Norm Coleman | 45 | 38% | 46% | |
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| LA | | D | Mary Landrieu | 46 | 33% | 20% | |
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| VA | | R | John Warner | 47 | 31% | 51% | |
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| ME | | R | Susan Collins | 48 | 30% | 25% | |
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| MT | | D | Jon Tester | 48 | 30% | 18% | |
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| SD | | D | Tim Johnson | 50 | 27% | 15% | |
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| OR | | R | Gordon Smith | 51 | 23% | 39% | |
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| ND | | D | Byron Dorgan | 52 | 23% | 8% | |
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| MT | | D | Max Baucus | 53 | 20% | 14% | |
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| WI | | D | Russ Feingold | 53 | 20% | 7% | |
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| WA | | D | Maria Cantwell | 55 | 17% | 13% | |
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| AR | | D | Blanche Lincoln | 55 | 17% | 12% | |
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| NV | | D | Harry Reid | 57 | 16% | 8% | |
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| MO | | D | Claire McCaskill | 58 | 15% | 14% | |
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| OR | | D | Ron Wyden | 59 | 14% | 9% | |
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| VT | | I | Bernie Sanders | 60 | 13% | 8% | |
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| MI | | D | Debbie Stabenow | 60 | 13% | 6% | |
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| OH | | D | Sherrod Brown | 60 | 13% | 5% | |
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| ME | | R | Olympia Snowe | 63 | 12% | 13% | |
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| NE | | D | Ben Nelson | 64 | 11% | 28% | |
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| IN | | D | Evan Bayh | 64 | 11% | 6% | |
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| FL | | D | Bill Nelson | 66 | 10% | 14% | |
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| WV | | D | Robert Byrd | 66 | 10% | 4% | |
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| CT | | I | Joseph Lieberman | 68 | 9% | 73% | |
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| AR | | D | Mark Pryor | 70 | 8% | 11% | |
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| RI | | D | Sheldon Whitehouse | 70 | 8% | 10% | |
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| RI | | D | Jack Reed | 70 | 8% | 5% | |
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| DE | | D | Thomas Carper | 73 | 7% | 10% | |
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| WI | | D | Herb Kohl | 74 | 7% | 7% | |
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| CO | | D | Ken Salazar | 74 | 7% | 6% | |
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| MA | | D | John Kerry | 77 | 4% | 4% | |
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| ND | | D | Kent Conrad | 78 | 3% | 8% | |
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| HI | | D | Daniel Inouye | 78 | 3% | 5% | |
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| IA | | D | Tom Harkin | 80 | 3% | 1% | |
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| WA | | D | Patty Murray | 81 | 3% | 7% | |
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| CA | | D | Barbara Boxer | 82 | 3% | 3% | |
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| NY | | D | Hillary Clinton | 82 | 3% | 3% | |
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| VA | | D | Jim Webb | 84 | 3% | 8% | |
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| NM | | D | Jeff Bingaman | 84 | 3% | 8% | |
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| CA | | D | Dianne Feinstein | 84 | 3% | 8% | |
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| MD | | D | Benjamin Cardin | 84 | 3% | 7% | |
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| MN | | D | Amy Klobuchar | 84 | 3% | 5% | |
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| MI | | D | Carl Levin | 84 | 3% | 5% | |
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| WV | | D | John Rockefeller | 84 | 3% | 4% | |
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| CT | | D | Christopher Dodd | 84 | 3% | 3% | |
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| HI | | D | Daniel Akaka | 84 | 3% | 3% | |
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| IL | | D | Richard Durbin | 84 | 3% | 2% | |
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| PA | | D | Bob Casey | 84 | 3% | 2% | |
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| VT | | D | Patrick Leahy | 84 | 3% | 2% | |
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| NJ | | D | Frank Lautenberg | 96 | 0% | 4% | |
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| NY | | D | Chuck Schumer | 96 | 0% | 3% | |
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| MD | | D | Barbara Mikulski | 96 | 0% | 3% | |
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| NJ | | D | Robert Menendez | 96 | 0% | 3% | |
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| DE | | D | Joseph Biden | 96 | 0% | 0% | |
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| AZ | | R | John McCain | 0 | 54% | 75% | |
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| MA | | D | Edward Kennedy | 0 | 7% | 5% | |
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| IL | | D | Barack Obama | 0 | 9% | 4% | |
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