The ACLU is much more closely aligned with the Libertarian Party, although they don't officially associate with any political party. They were huge critics of the Obama administration, the "embodiment of the Democratic Party" -- to some people, at least. They've also been huge advocates for Title IX reform on college campuses and opposed restrictions of student expression. It's wishful thinking that they are any closer to the Democratic Party than the Republican Party -- both are enemies of freedom, most of the time.