This story originally appeared at Cal Matters. When the dam of discontented Democrats calling upon President Joe Biden to suspend his flagging presidential campaign finally broke last week, Rep. Nancy Pelosi was standing at the floodgates. Pelosi stepped down from being speaker of the House in 2022. Technically, that makes her a mere congressional backbencher from San Francisco, just one member, well into her 80s, among 212 other Democrats in the House of Representatives. That she has played such a pivotal role, mostly out of the spotlight, in convincing, badgering and pressuring Biden to end …