New York Magazine has a rundown of the attitudes of some of the G.O.P. candidates for the nomination in regards to evolution. Remember, this is an issue which is split down the middle in the American populace, but elites have a strong skew toward accepting evolution. This is probably why despite a majority Creationist primary electorate in 2008 the majority of Republican candidates still agreed with the evolutionary position. In 2012 it looks like the Creationism or semi-Creationist contingent is going to get larger.
In the General Social Survey they asked in the late 2000s whether respondents accepted that “humans developed from animals.” The response was dichotomous. Here are some results for various population groups:
Accepts human development from animals
Democrat
59
Independent
53
Republican
42
Liberal
69
Moderate
52
Conservative
39
White
54
Black
35
Hispanic
52
No high school diploma
42
High school diploma
46
Junior college
53
Bachelor
63
Graduate
72
New England
81
Mid Atlantic
60
Great Lakes
52
Upper Midwest
54
South Atlantic
46
East South Central
29
Southwest
38
Mountain
53
Pacific
64
Protestant
35
Catholic
65
Jewish
79
No religion
79
Age 18-34
58
Age 36-64
51
Age 65-*
43