The CIA believed that abstract expressionism, with its unbound and individualistic style, could be associated with American freedoms, so they secretly funded the "Congress for Cultural Freedom", an anti-communist advocacy group that promoted American arts and culture, including abstract expressionism, through international art shows and publications.
Art or writings that touched on US racism (Pollock was contemporaneous with numerous lynchings) and imperialism (Guatemala, Iran, Greece, Korea) were, of course, passed over.
Ever since I learned this, I have lost all emotional appreciation for his works. While before they seemed free, now they seem cheap.