| KY | 00 | R | Rand Paul | 1 | 100% | 100% | |
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| SC | | R | Jim DeMint | 1 | 100% | 100% | |
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| UT | 00 | R | Mike Lee | 1 | 100% | 100% | |
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| WI | 00 | R | Ron Johnson | 4 | 97% | 99% | |
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| UT | | R | Orrin Hatch | 5 | 93% | 80% | |
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| PA | | R | Pat Toomey | 6 | 93% | 95% | |
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| FL | 00 | R | Marco Rubio | 7 | 91% | 94% | |
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| AZ | | R | John McCain | 7 | 91% | 85% | |
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| OK | | R | Tom Coburn | 9 | 87% | 96% | |
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| NH | | R | Kelly Ayotte | 10 | 86% | 92% | |
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| SC | 00 | R | Lindsey Graham | 10 | 86% | 77% | |
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| ID | 00 | R | Jim Risch | 12 | 86% | 90% | |
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| ID | 00 | R | Mike Crapo | 12 | 86% | 81% | |
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| OK | | R | James Inhofe | 14 | 84% | 93% | |
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| TN | | R | Bob Corker | 15 | 84% | 81% | |
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| AZ | | R | Jon Kyl | 16 | 82% | 92% | |
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| TX | 00 | R | John Cornyn | 17 | 82% | 87% | |
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| IN | | R | Daniel Coats | 18 | 79% | 88% | |
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| OH | | R | Rob Portman | 18 | 79% | 80% | |
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| AL | | R | Jeff Sessions | 20 | 78% | 86% | |
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| IA | 00 | R | Chuck Grassley | 20 | 78% | 77% | |
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| LA | | R | David Vitter | 22 | 76% | 84% | |
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| NC | | R | Richard Burr | 23 | 75% | 85% | |
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| WY | 00 | R | John Barrasso | 24 | 74% | 87% | |
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| KY | 00 | R | Mitch McConnell | 24 | 74% | 84% | |
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| WY | | R | Michael Enzi | 26 | 71% | 86% | |
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| NV | | R | Dean Heller | 27 | 71% | 62% | |
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| GA | | R | Saxby Chambliss | 28 | 68% | 83% | |
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| KS | | R | Jerry Moran | 29 | 68% | 73% | |
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| AL | | R | Richard Shelby | 30 | 66% | 76% | |
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| AR | | R | John Boozman | 31 | 65% | 72% | |
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| GA | | R | Johnny Isakson | 32 | 64% | 78% | |
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| SD | 00 | R | John Thune | 33 | 62% | 80% | |
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| MS | 00 | R | Roger Wicker | 34 | 60% | 71% | |
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| MO | | R | Roy Blunt | 35 | 58% | 75% | |
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| KS | | R | Pat Roberts | 36 | 55% | 73% | |
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| TX | | R | Kay Hutchison | 37 | 55% | 71% | |
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| NE | | R | Mike Johanns | 38 | 53% | 75% | |
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| TN | | R | Lamar Alexander | 39 | 53% | 68% | |
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| IN | | R | Richard Lugar | 40 | 52% | 64% | |
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| ME | | R | Olympia Snowe | 41 | 50% | 32% | |
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| MS | | R | Thad Cochran | 42 | 48% | 68% | |
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| ND | 00 | R | John Hoeven | 43 | 42% | 54% | |
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| MA | | R | Scott Brown | 43 | 42% | 51% | |
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| AK | 00 | R | Lisa Murkowski | 45 | 41% | 61% | |
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| ME | 00 | R | Susan Collins | 46 | 38% | 37% | |
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| AR | | D | Mark Pryor | 47 | 28% | 16% | |
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| MO | | D | Claire McCaskill | 48 | 26% | 19% | |
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| WV | 00 | D | Joe Manchin | 49 | 24% | 13% | |
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| VA | | D | Jim Webb | 50 | 22% | 12% | |
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| MI | 00 | D | Debbie Stabenow | 51 | 20% | 19% | |
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| VA | 00 | D | Mark Warner | 52 | 20% | 18% | |
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| NJ | | D | Frank Lautenberg | 53 | 17% | 6% | |
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| MT | 00 | D | Jon Tester | 54 | 17% | 16% | |
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| DE | 00 | D | Thomas Carper | 54 | 17% | 11% | |
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| WI | | D | Herb Kohl | 54 | 17% | 8% | |
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| PA | 00 | D | Bob Casey | 54 | 17% | 4% | |
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| CO | 00 | D | Michael Bennet | 58 | 16% | 12% | |
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| NE | | D | Ben Nelson | 59 | 16% | 30% | |
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| LA | | D | Mary Landrieu | 59 | 16% | 16% | |
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| NC | | D | Kay Hagan | 59 | 16% | 9% | |
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| NJ | 00 | D | Robert Menendez | 62 | 14% | 18% | |
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| OR | 00 | D | Ron Wyden | 62 | 14% | 10% | |
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| DE | 00 | D | Christopher Coons | 62 | 14% | 9% | |
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| NH | 00 | D | Jeanne Shaheen | 62 | 14% | 8% | |
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| CO | | D | Mark Udall | 66 | 13% | 9% | |
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| FL | | D | Bill Nelson | 67 | 13% | 13% | |
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| MN | 00 | D | Amy Klobuchar | 67 | 13% | 7% | |
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| MT | | D | Max Baucus | 69 | 12% | 13% | |
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| IA | | D | Tom Harkin | 70 | 11% | 3% | |
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| CT | 00 | D | Richard Blumenthal | 71 | 10% | 6% | |
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| CA | 00 | D | Dianne Feinstein | 72 | 10% | 7% | |
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| OR | 00 | D | Jeff Merkley | 72 | 10% | 5% | |
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| RI | 00 | D | Sheldon Whitehouse | 72 | 10% | 5% | |
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| RI | 00 | D | Jack Reed | 72 | 10% | 5% | |
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| OH | 00 | D | Sherrod Brown | 72 | 10% | 4% | |
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| IL | 00 | D | Richard Durbin | 72 | 10% | 3% | |
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| CT | | I | Joseph Lieberman | 78 | 9% | 43% | |
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| NV | | D | Harry Reid | 79 | 9% | 6% | |
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| WA | 00 | D | Maria Cantwell | 80 | 9% | 14% | |
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| SD | | D | Tim Johnson | 80 | 9% | 12% | |
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| NM | | D | Jeff Bingaman | 80 | 9% | 8% | |
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| MA | | D | John Kerry | 80 | 9% | 5% | |
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| NY | 00 | D | Chuck Schumer | 80 | 9% | 4% | |
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| AK | | D | Mark Begich | 85 | 8% | 7% | |
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| VT | | D | Patrick Leahy | 85 | 8% | 3% | |
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| VT | 00 | I | Bernie Sanders | 87 | 7% | 8% | |
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| CA | | D | Barbara Boxer | 88 | 5% | 3% | |
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| WA | 00 | D | Patty Murray | 89 | 5% | 7% | |
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| HI | | D | Daniel Akaka | 90 | 5% | 4% | |
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| NM | | D | Tom Udall | 91 | 5% | 18% | |
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| NY | 00 | D | Kirsten Gillibrand | 91 | 5% | 8% | |
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| MD | 00 | D | Benjamin Cardin | 91 | 5% | 5% | |
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| MD | | D | Barbara Mikulski | 91 | 5% | 4% | |
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| MN | | D | Al Franken | 91 | 5% | 2% | |
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| HI | | D | Daniel Inouye | 96 | 5% | 5% | |
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| ND | | D | Kent Conrad | 97 | 3% | 19% | |
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| MI | | D | Carl Levin | 98 | 3% | 4% | |
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| WV | | D | John Rockefeller | 99 | 0% | 3% | |
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| HI | 00 | D | Brian Schatz | n.a. | n.a. | n.a. | |
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| IL | | R | Mark Kirk | n.a. | n.a. | 39% | |
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