Astor, Maggie Glueck, Katie (April 14, 2020). "Barack Obama Endorses Joe Biden for President". Shear, Michael D. (April 24, 2017). "Obama Steps Back into Public Life, Trying to Avoid One Word: Trump". Hope, Leah (September 14, 2017). "Obama Foundation retains public assembly about presidential library task". Howley, Kathleen (September 1, 2019). "Barack And Michelle Obama Are Buying Martha's Vineyard Estate From Boston Celtics Owner".