A number of Maine schools that serve as Election Day polling places are canceling classes on Nov. 8, citing big crowds, possible parking and traffic issues, and student safety. Officials at schools that are staying open say the physical layout of the campus allows voters access to the polls without interacting with any students. “I was not comfortable last year with having polls open in our school,” said John Suttie, who is both district superintendent and principal of Old Orchard Beach High School, where a polling station is located.