And going back even further, to Obama's father (Barack Obama Sr.), mother (Stanley Ann Dunham), his far-left grandparents who raised him from age 10-18, Frank Marshall Davis, and his radical professors Edward Said, and Roberto Unger.
Then post-college, Rev. Jeremiah Wright, William Ayers, and the core ideology he inherited from them, a mix of Anti-Colonialism, Liberation Theology, and Social Marxism.

https://www.youtube.com/watch?v=FqPYJn6Mftw

Again beautifully and beyond dispute laid out in their own self-incriminating words.