I think they're deducing that from Bezos's ownership of the Washington Post, which is (very mildly) progressive (left of the establishment median). I don't kno

I think they're deducing that from Bezos's ownership of the Washington Post, which is (very mildly) progressive (left of the establishment median). I don't know that Bezos has himself really indicated much about his own political preferences nor does he exert strong editorial control over the Po.