Who’s funding American politics? Just 11 donors have combined to spend $1 billion - The Washington Post

The intense concentration of money — one-fifth of all contributions collected by such groups — shows the outsize reach of a tiny group of wealthy individuals. ....
https://www.washingtonpost.com/politics/eleven-donors-plowed-1-billion-into-super-pacs-since-2010/2018/10/26/31a07510-d70a-11e8-aeb7-ddcad4a0a54e_story.html