Sample is from 57 liberal arts colleges.
If you ran the study on business colleges, science and technical schools, and all-round universities, you'll get a very different result. I'll tell you that for nothing because if there's one thing I know, it's academia.
All this really proves is that you don't see a lot of Republicans in liberal arts fields, and is that really a surprise when Republicanism has been so openly hostile to liberal arts fields?