washington win bernie sanders supporters flock insurgent presidential campaign first possibly tough order business hillary clinton become presumptive democratic presidential nominee week every time vermont senator mention clinton name rally california thursday night supporters boo donald trump republican businessman face clinton nov. election clinton waste time launch charm offensive call sanders tuesday night celebratory rally brooklyn praise candidacy say vigorous debate nominate contest good democratic party democrats camp say expect see specific olive branch offer sanders weeks ahead include compromise issue platform adopt party july nominate convention reform democratic primary process sanders criticize rig favor establishment may easy sell sander supporters help catapult political obscurity national spotlight cheer message income inequality campaign finance reform wall street excesses give little chance year ago sanders earn nearly 10 million vote 20 state nominate process reuters/ipsos poll may find sanders supporters become increasingly resistant clinton past months less half say vote become party nominee last month 41 percent sanders supporters say would vote clinton trump general election 50 percent april 52 percent march group support sanders plan ramp pressure superdelegates prominent party officials vote candidate last weeks clinton nomination become official party convention philadelphia people behind occupy dnc convention facebook group around 25,000 members create web-based app contact superdelegates plan daily email urge switch sanders clinton move leave fend sanders primary battle oppose trans-pacific partnership asian trade pact keystone oil pipeline canada voice support high minimum wage back sanders general goals rein wall street reduce income inequality best move win progressive voters back sanders would show stand behind position one big point skepticism hear sanders supporters even lukewarm clinton supporters question whether really mean stuff say primary say adam green co-founder progressive change campaign committee next two weeks golden opportunity make answer apparent say cite pledge seek criminal sentence financial fraud break bank pose economic risk expand social security benefit several democrats say trump may prove chief motivator sanders supporters switch clinton trump do anyone push sanders people toward clinton general election say brad anderson iowa-based democratic strategist support clinton primary say see sign shift last weeks clinton could make specific concessions overtures assuage sanders particularly eliminate superdelegates primary process sanders complain involvement superdelegates heavily back clinton another easy way get sanders passionate supporters board simply hire say democratic strategist steve schale schale florida-based staffer president barack obama 2008 presidential campaign bitter primary fight obama clinton end year florida crucial obama prospect campaign need large operation work voter registration persuasion turnout clinton could offer sanders diehards similar opportunity stay involve lot folks campaign much social call movement say concern 2008 clinton supporters would disaffect support obama clinton endorse less month primary end unify party democratic party leaders may also help ease tensions sanders meet thursday obama senate democratic leader harry reid nevada woo sanders supporters tough task clinton