A grammar blog (lol) has put together an analysis of the number of grammatical errors made by supporters of each of the candidates on Facebook. The results are as follows:
Number of grammatical errors per 100 words:
Trump supporters: 12.6
Santorum supporters: 11.5
Rubio supporters: 8.8
Paul supporters: 8.4
Christie supporters: 8.3
Jindal supporters: 8.2
Huckabee supporters: 8.0
Bush supporters: 7.9
Kasich supporters: 7.7
Cruz supporters: 7.3
Pataki supporters: 7.2
Graham supporters: 7.2
Carson supporters: 6.6
Fiorina supporters 6.3
Clinton supporters: 6.3
O'Malley supporters: 4.6
Sanders supporters: 3.7
Webb supporters: 3.4
Chafee supporters: 3.1
>Not including Gilmore
>Not including Lessig
http://www.grammarly.com/blog/2015/presidential-debate-grammar-power-rankings/