"We need to ensure, if we want to be competitive, that every single American who wants a higher education can get one," Castro said in New Hampshire, according to The Hill.
"That's why I believe that we need to work toward a tuition-free system of public university, college, apprenticeship and certification programs in this country to have the smartest, most well-prepared workforce that we can in this 21st century," he added.
Read more about Julian Castro's campaign.