A ride to the airport with U.S. Republican Party leader Jeb Bush sitting beside her was no mean feat for Alex Swisher. A 20-year-old student at the University of Tennessee, Swisher was the head of a students' volunteer group that until recently campaigned for Bush in Tennessee and beyond. She is one of hundreds of thousands of youth volunteers across the United States who are campaigning this presidential election for their favorite candidates. Volunteers traditionally are the backbone of electoral campaigning in a country where political activism runs deep among the youth.