The president of the National Association for the Advancement of Colored People and other employees of the organization were arrested around 7 p.m. CST Tuesday after they refused to leave Sen. Jeff Sessions’ office in Mobile, Ala.

President Cornell Brooks and three other staffers were taken into police custody after spending the day sitting on the floor of the Republican senator’s office. Brooks said they would not leave until either Sessions declined his nomination as attorney general or they were arrested.