What group did Democrats not want to support?

Democrats historically faced internal divisions regarding support for various groups, including labor unions and certain progressive movements. In certain contexts, especially during the late 20th century, some Democrats were hesitant to fully support more radical factions within the Civil Rights Movement or environmental activists, fearing potential backlash from moderate constituents or corporate interests. Additionally, during the 2016 election cycle, there were tensions between the establishment wing of the party and the more progressive Bernie Sanders supporters.