References:

- Pete Buttigieg, in First Campaign for State Treasurer, Swore Off Bank Money, Citing "Conflict of Interest"

- Dems Skirt ‘No Fossil Fuel Money’ Pledge as Trump Rakes in Oil and Gas Donations

Notes:

*Update: the Buttigieg campaign has said that it is returning these funds, but FEC filings show that they returned only half $2,800/$5,600