John McCain and 19% didn't answer the question, according to Mark Hugo Lopez, associate director of the Pew Hispanic Center.

CNN: Casting ballots on both sides of the U.S.-Mexico border

Mark Brownstein, an associate vice president with the Environmental Defense Fund, said many oil and gas companies claim to be leaders in protecting the environment, and "this can be one opportunity for them to demonstrate that leadership" by submitting to an audit.

WSJ: Both sides agree on tough new fracking standards

So Dr. Mark Daniel DeBoer, an associate professor of pediatric endocrinology at the University of Virginia School of Medicine, and his colleagues turned to a large database of 10, 700 children in the Early Childhood Longitudinal Survey, Birth Cohort to investigate the relationship between the type of milk children drank and their body mass index (BMI).

CNN: Drinking skim milk may not lower child obesity risk