'Tone-deaf': Many of the 15 Democratic lawmakers who signed a pledge to refuse donations from fossil fuel companies have their own cash invested in coal, oil, and natural gas companies, E&E News reported Friday . Ditching personal assets was not a requirement for those who signed the No Fossil Fuel Money Pledge, a joint venture 17 activist groups promoted, the report notes, citing campaign records. Most of the signers kept their promise to reject contributions from fossil fuel executives. Reps. Beto O’Rourke of Texas, Keith Ellison of Minnesota, Ro Khanna and Barbara Lee of California, as well as Sens.