Marquette Law School student Caleb Smith waited more than an hour on Tuesday to cast his ballot in the presidential primary, standing in a line of students of nearly 100 students that snaked around the school’s student union.Others were not so lucky. Many students who had come on their lunch break left when they saw the line, saying they had to go to class and would try to come back later. Polls close at 8 p.m., and volunteers with the League of Women Voters told ThinkProgress they were concerned some students would not be able to return. Marquette University employees said the majority of the school’s 12,000 enrolled students were assigned to a single precinct.