(Reuters) – U.S. Senator Elizabeth Warren and Representative Katie Porter have asked the CEOs of JPMorgan Chase & Co and Goldman Sachs Group Inc for information related to trading of Russian debt since the Ukraine conflict began. The Democratic lawmakers asked for a list of clients involved in trading of Russian government and corporate debt since Feb. 24, when Moscow launched a “special military operation” against Ukraine. Details were sought on the type, amount and profits related to these trades, as well as profits the banks made from them, according to letters that were sent to the chief e…