Pope Francis mentioned "Catholic" Communist Dorothy Day in his speech to US Congress - that we should look up to her so I checked Google about her and got shocking results:
Dorothy Day, a Communist?
Senator calls Dorothy Day 'a woman of loathsome character'
Dorothy Day, "Catholic Communist" Propagandist and Agitator
The Catholic Communizer Dorothy Day.
Socialist Dorothy Day Being Prepared for ‘Beatification’
Also Pope mentioned "Catholic" theologian Thomas Merton who got heavily into Eastern Mysticism.