The main participants who testified to the Senate Banking Committee were the Securities and Exchange Commission (SEC) Chairman Jay Clayton and the Commodity Futures Trading Commission (CFTC) Chairman Christopher Giancarlo. Clayton was appointed by Trump in January 2017; Giancarlo was nominated as Commissioner by Obama in 2013. Both had storied careers in finance and the private sector. The Senators who seemed the most interested and asked the most relevant questions were Elizabeth Warren (D-MA) and Mark Warner (D-VA).