https://www.opensecrets.org/outsidespending/detail.php?cmte=...
Total Independent Expenditures: $41,016,106
For Democrats: $92,936
Against Democrats: $8,887,525
For Republicans: $32,035,645
Against Republicans: $0
Koch industry donations:https://www.opensecrets.org/search?order=desc&q=Koch+Industr...
Edit: Added link showing recent Koch Industry donations