Americans' confidence in U.S. public schools, by party identification
Percent (%) with "a great deal" or "quite a lot" of confidence
Source: Gallup polls on Americans' confidence in institutions: Poll 1, Poll 2, Poll 3, Poll 4. 
Note: Item asks, "Now I am going to read you a list of institutions in American society. Please tell me how much confidence you, yourself have in each one -- a great deal, quite a lot, some, or, very little?"-The public schools.