Iowa Democratic Voters
| Ideology | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
|---|---|---|---|---|---|---|---|---|---|---|
| Very liberal | 18 | 7 | 24 | 3 | 16 | 0 | 4 | 40 | 5 | 2 |
| Somewhat liberal | 36 | 3 | 25 | 1 | 25 | - | 1 | 36 | 9 | 2 |
| Moderate | 40 | 6 | 31 | 1 | 22 | 0 | 0 | 33 | 6 | 1 |
| Conservative | 6 | 3 | 22 | 2 | 42 | - | 1 | 21 | 6 | 3 |
| Party identification | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Democrat | 76 | 5 | 31 | 1 | 23 | 0 | 0 | 32 | 6 | 2 |
| Republican | 3 | 4 | 10 | 3 | 32 | - | 2 | 44 | 5 | 1 |
| Indep. | 20 | 4 | 17 | 1 | 23 | 0 | 2 | 41 | 10 | 1 |
| Sex | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Male | 43 | 6 | 23 | 2 | 24 | - | 2 | 35 | 7 | 2 |
| Female | 57 | 3 | 30 | 1 | 23 | 0 | 1 | 35 | 7 | 1 |
| Age | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| 17-24 | 17 | 3 | 10 | 2 | 14 | 0 | 2 | 57 | 10 | 0 |
| 25-29 | 6 | 2 | 15 | 0 | 12 | 0 | 3 | 57 | 8 | 2 |
| 30-44 | 18 | 3 | 23 | 1 | 21 | - | 1 | 42 | 6 | 2 |
| 45-59 | 29 | 6 | 26 | 2 | 30 | 0 | 0 | 29 | 6 | 2 |
| 60-64 | 9 | 5 | 34 | 1 | 32 | - | 2 | 21 | 6 | 1 |
| 65+ | 22 | 6 | 45 | 1 | 22 | - | 0 | 18 | 7 | 2 |
| Race | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| White | 93 | 5 | 27 | 1 | 24 | 0 | 1 | 33 | 7 | 2 |
| Black | 4 | - | 16 | 1 | 8 | 1 | - | 72 | 3 | - |
| Other | 3 | 4 | 26 | 3 | 5 | 0 | 2 | 49 | 10 | - |
| Family income | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Less than $50,000 | 42 | 4 | 32 | 1 | 19 | 0 | 2 | 34 | 7 | 1 |
| $50,000 or more | 58 | 5 | 23 | 2 | 25 | 0 | 0 | 36 | 7 | 2 |
| Marital status | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Yes | 58 | 6 | 29 | 1 | 27 | 0 | 0 | 28 | 6 | 2 |
| No | 42 | 3 | 24 | 1 | 17 | 0 | 2 | 43 | 9 | 1 |
| When did you finally decide for whom to vote? | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Just today | 11 | 4 | 20 | 2 | 28 | 0 | 1 | 31 | 9 | 4 |
| In the last three days | 9 | 9 | 22 | 3 | 27 | 0 | - | 33 | 7 | 0 |
| Sometime last week | 7 | 6 | 28 | 2 | 28 | - | 2 | 24 | 10 | 1 |
| In the last month | 24 | 4 | 23 | 1 | 27 | 0 | 2 | 33 | 9 | 1 |
| Before that | 49 | 4 | 32 | 1 | 19 | - | 1 | 38 | 5 | 0 |
| Population of area | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| City over 50,000 | 42 | 5 | 23 | 1 | 18 | 0 | 2 | 40 | 8 | 2 |
| Suburbs | 27 | 5 | 25 | 2 | 28 | 0 | 1 | 30 | 8 | 1 |
| Small city/Rural | 31 | 4 | 33 | 1 | 25 | - | 0 | 31 | 4 | 1 |
| Union household | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Yes | 22 | 3 | 30 | 2 | 24 | - | 1 | 30 | 8 | 2 |
| No | 78 | 5 | 26 | 1 | 23 | 0 | 1 | 36 | 7 | 1 |
| First-time voters | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Voted | 43 | 8 | 24 | 2 | 30 | 0 | 1 | 26 | 7 | 2 |
| First caucus | 57 | 2 | 29 | 1 | 18 | 0 | 1 | 41 | 7 | 1 |
| Which ONE of these three issues is the most important facing the country? | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Health care | 27 | 1 | 30 | 0 | 27 | 0 | 1 | 34 | 5 | 2 |
| The war in Iraq | 35 | 8 | 26 | 2 | 17 | 0 | 1 | 35 | 9 | 1 |
| The economy | 35 | 3 | 26 | 1 | 26 | 0 | 1 | 36 | 6 | 2 |
| Which ONE of these four candidate qualities mattered most in deciding how you voted today? | % of Group | Biden | Clinton | Dodd | Edwards | Gravel | Kucinich | Obama | Richardson | Uncommitted |
| Has the right experience | 20 | 12 | 49 | 2 | 9 | - | 1 | 5 | 20 | 1 |
| Can bring about needed change | 52 | 2 | 19 | 1 | 20 | 0 | 1 | 51 | 4 | 1 |
| Has the best chance to win in November | 8 | 5 | 30 | 1 | 36 | 1 | - | 23 | 3 | 2 |
| Cares about people like me | 19 | 2 | 22 | 2 | 44 | 0 | 1 | 24 | 3 | 2 |
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