That's going to cost them more than 1%.
http://www.electproject.org/home/voter-turnout/demographics
https://journals.openedition.org/espacoeconomia/13444?lang=fr
And, finally, this little gem:
"After controlling for poverty rate, percent African American and Latino populations, educational attainment, and spatial autocorrelation in the error term, we found that higher county-level obesity prevalence rates were associated with higher levels of support for the 2012 Republican Party presidential candidate."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4692249/
Yes, folks, being a Republican in a Republican-leaning county IS bad for your health.