longtime political adviser hillary clinton last year urge presidential campaign support new version law separate commercial investment bank avoid antagonize democratic party progressive wing accord email publish wikileaks monday mandy grunwald outside adviser clinton urge clinton policy team october 2015 days wall street policy rollout consider endorse new version glass-steagall act accord email review reuters glass-steagall act depression-era law prohibit commercial bank engage risky trade activities 1933 law repeal 1999 presidency bill clinton pass legislation remove barriers commercial bank investment bank insurance company many democratic activists believe reinstate glass-steagall law break large financial institutions would help prevent future financial crises one rock u.s. economy 2008. grunwald say clinton back new glass-steagall risk alienate liberal u.s. senator elizabeth warren massachusetts outspoken critic wall street popular leave wing democratic party clinton campaign would neither confirm deny authenticity late batch hack email clinton campaign chairman john podesta release wikileaks u.s. government last week formally accuse russia campaign cyber attack democratic party organizations charge russia deny result clinton campaign officials supporters warn email release could include fraudulent mislead document among genuine email time grunwald email clinton primary debate then-rival u.s. senator bernie sanders vermont fast approach grunwald worry clinton support new glass-steagall law would make difficult defend plan curb wall street risk could also prompt warren endorse sanders grunwald write email release wikileaks grunwald say conversations clinton former secretary state indicate lean toward endorse glass steagall instead addition risk-based approach ultimately announce understand face phoniness charge change position face risk way grunwald write add clinton policy team tell political decision weeks email clinton announce would look break large bank base risk pose economy base size alone type investment activity clinton also propose levy risk fee liabilities bank 50 billion assets say comprehensive approach democratic party source tell reuters monday believe around 50,000 podesta email possession wikileaks expect dribble periodically nov. election clinton republican presidential nominee donald trump previous dump hack email podesta friday include appear excerpt pay speeches clinton make wall street campaign refuse release clinton weigh reinstate glass-steagall wikileaks email show