 Throughout her life, Rosenblatt was consistently involved in political activism.Carrying on a tradition from her family championing the "underdog," her editorials in the "Barnard Bulletin" spoke to her concern for building democratic institutions.She was a strong supporter of the National Association for the Advancement of Colored People (NAACP), her socialist instincts led her to support Norman Thomas, before moving to FDR in the 1930s, and later in the 1990s and 2000s, she wrote her representatives often to effect policy changes, especially in relation to the No Child Left Behind Act.