| SC | | R | Jim DeMint | 1 | 100% | 100% | |
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| NC | | R | Richard Burr | 2 | 97% | 85% | |
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| OK | | R | Tom Coburn | 3 | 94% | 96% | |
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| AZ | | R | Jon Kyl | 4 | 92% | 95% | |
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| CO | | R | Wayne Allard | 5 | 91% | 92% | |
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| NV | | R | John Ensign | 6 | 90% | 93% | |
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| OK | | R | James Inhofe | 7 | 88% | 90% | |
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| KY | | R | Mitch McConnell | 7 | 88% | 87% | |
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| KY | | R | Jim Bunning | 7 | 88% | 86% | |
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| WY | | R | Michael Enzi | 7 | 88% | 84% | |
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| FL | | R | Mel Martinez | 11 | 87% | 80% | |
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| LA | | R | David Vitter | 11 | 87% | 79% | |
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| TX | | R | John Cornyn | 13 | 86% | 87% | |
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| GA | | R | Johnny Isakson | 13 | 86% | 81% | |
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| NC | | R | Elizabeth Dole | 13 | 86% | 80% | |
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| SC | | R | Lindsey Graham | 13 | 86% | 79% | |
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| NE | | R | Chuck Hagel | 17 | 85% | 89% | |
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| GA | | R | Saxby Chambliss | 17 | 85% | 86% | |
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| MS | | R | Trent Lott | 17 | 85% | 75% | |
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| NH | | R | Judd Gregg | 20 | 83% | 90% | |
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| KS | | R | Sam Brownback | 21 | 82% | 89% | |
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| MS | | R | Thad Cochran | 21 | 82% | 66% | |
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| UT | | R | Robert Bennett | 23 | 81% | 75% | |
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| AL | | R | Jeff Sessions | 24 | 79% | 80% | |
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| AL | | R | Richard Shelby | 24 | 79% | 66% | |
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| SD | | R | John Thune | 26 | 78% | 72% | |
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| ID | | R | Larry Craig | 27 | 77% | 78% | |
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| NH | | R | John Sununu | 28 | 73% | 92% | |
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| ID | | R | Mike Crapo | 28 | 73% | 72% | |
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| TX | | R | Kay Hutchison | 28 | 73% | 64% | |
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| TN | | R | Bob Corker | 31 | 71% | 60% | |
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| UT | | R | Orrin Hatch | 32 | 68% | 64% | |
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| KS | | R | Pat Roberts | 33 | 67% | 63% | |
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| IN | | R | Richard Lugar | 34 | 66% | 59% | |
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| IA | | R | Chuck Grassley | 35 | 65% | 74% | |
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| TN | | R | Lamar Alexander | 35 | 65% | 71% | |
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| NM | | R | Pete Domenici | 37 | 61% | 59% | |
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| OH | | R | George Voinovich | 38 | 58% | 47% | |
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| MO | | R | Christopher Bond | 39 | 57% | 59% | |
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| AK | | R | Lisa Murkowski | 40 | 55% | 57% | |
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| VA | | R | John Warner | 41 | 54% | 58% | |
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| MN | | R | Norm Coleman | 42 | 50% | 48% | |
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| AK | | R | Ted Stevens | 43 | 48% | 55% | |
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| OR | | R | Gordon Smith | 44 | 45% | 44% | |
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| PA | | D | Arlen Specter | 44 | 45% | 42% | |
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| ME | | R | Susan Collins | 46 | 32% | 23% | |
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| LA | | D | Mary Landrieu | 47 | 25% | 15% | |
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| NJ | | D | Frank Lautenberg | 48 | 21% | 6% | |
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| NE | | D | E. Benjamin Nelson | 49 | 18% | 33% | |
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| FL | | D | Bill Nelson | 50 | 16% | 15% | |
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| ME | | R | Olympia Snowe | 50 | 16% | 13% | |
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| OR | | D | Ron Wyden | 50 | 16% | 7% | |
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| WI | | D | Herb Kohl | 50 | 16% | 6% | |
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| HI | | D | Daniel Inouye | 50 | 16% | 5% | |
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| MA | | D | Edward Kennedy | 50 | 16% | 4% | |
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| NM | | D | Jeff Bingaman | 56 | 15% | 42% | |
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| VA | | D | Jim Webb | 56 | 15% | 13% | |
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| MO | | D | Claire McCaskill | 56 | 15% | 13% | |
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| AR | | D | Mark Pryor | 56 | 15% | 12% | |
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| WA | | D | Maria Cantwell | 56 | 15% | 12% | |
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| DE | | D | Thomas Carper | 56 | 15% | 11% | |
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| CA | | D | Dianne Feinstein | 56 | 15% | 9% | |
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| WA | | D | Patty Murray | 56 | 15% | 8% | |
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| MD | | D | Benjamin Cardin | 56 | 15% | 8% | |
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| NJ | | D | Robert Menendez | 56 | 15% | 4% | |
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| MD | | D | Barbara Mikulski | 56 | 15% | 4% | |
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| RI | | D | Sheldon Whitehouse | 67 | 14% | 11% | |
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| RI | | D | Jack Reed | 67 | 14% | 4% | |
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| MI | | D | Carl Levin | 69 | 13% | 5% | |
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| NV | | D | Harry Reid | 69 | 13% | 5% | |
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| IN | | D | Evan Bayh | 71 | 11% | 37% | |
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| MT | | D | Max Baucus | 71 | 11% | 12% | |
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| ND | | D | Kent Conrad | 71 | 11% | 10% | |
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| CO | | D | Ken Salazar | 71 | 11% | 5% | |
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| CT | | D | Christopher Dodd | 71 | 11% | 3% | |
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| CT | | D | Joseph Lieberman | 76 | 10% | 37% | |
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| VT | | I | Bernie Sanders | 77 | 9% | 6% | |
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| IL | | D | Dick Durbin | 77 | 9% | 2% | |
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| CA | | D | Barbara Boxer | 77 | 9% | 2% | |
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| AR | | D | Blanche Lincoln | 80 | 8% | 10% | |
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| MN | | D | Amy Klobuchar | 80 | 8% | 6% | |
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| MT | | D | Jon Tester | 80 | 8% | 6% | |
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| WV | | D | John Rockefeller | 80 | 8% | 5% | |
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| NY | | D | Chuck Schumer | 80 | 8% | 4% | |
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| MA | | D | John Kerry | 80 | 8% | 3% | |
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| VT | | D | Patrick Leahy | 80 | 8% | 2% | |
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| WV | | D | Robert Byrd | 80 | 8% | 2% | |
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| HI | | D | Daniel Akaka | 80 | 8% | 2% | |
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| MI | | D | Debbie Stabenow | 89 | 5% | 3% | |
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| WI | | D | Russ Feingold | 90 | 4% | 36% | |
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| ND | | D | Byron Dorgan | 90 | 4% | 2% | |
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| DE | | D | Joseph Biden | 92 | 0% | 35% | |
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| OH | | D | Sherrod Brown | 92 | 0% | 3% | |
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| NY | | D | Hillary Clinton | 92 | 0% | 3% | |
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| IL | | D | Barack Obama | 92 | 0% | 2% | |
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| PA | | D | Robert Casey | 92 | 0% | 0% | |
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| IA | | D | Tom Harkin | 92 | 0% | 0% | |
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| WY | | R | Craig Thomas | 0 | n.a. | 83% | |
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| AZ | | R | John McCain | 0 | n.a. | 82% | |
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| WY | | R | John Barrasso | 0 | n.a. | 80% | |
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| SD | | D | Tim Johnson | 0 | n.a. | 11% | |
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