| Similarity | Rank | |
|---|---|---|
| Zogby | 0.863 | 98864 |
| Pew | 0.774 | 25766 |
| pollster | 0.774 | 73527 |
| poll | 0.759 | 6805 |
| survey's | 0.752 | 87684 |
| Rasmussen | 0.751 | 36781 |
| Barna | 0.746 | 91612 |
| pollsters | 0.735 | 63781 |
| Ipsos | 0.725 | 76730 |
| Poll | 0.708 | 23153 |
| survey | 0.708 | 2189 |
| Quinnipiac | 0.684 | 73161 |
| polls | 0.679 | 9427 |
| Polling | 0.673 | 60869 |
| Brookings | 0.670 | 43136 |
| Survey | 0.665 | 8173 |
| Nielsen | 0.654 | 22948 |
| YouGov | 0.654 | 84388 |
| Nielson | 0.653 | 85265 |
| Polls | 0.645 | 42672 |
| polled | 0.644 | 26841 |
| Santorum | 0.644 | 29615 |
| Politico | 0.643 | 50296 |
| surveyed | 0.643 | 10778 |
| Seligman | 0.638 | 79258 |