philadelphia new york media mogul michael bloomberg assail fellow billionaire donald trump wednesday call u.s. presidential race con rip history bankruptcies lawsuits trump say want run nation like run business god help us bloomberg tell democratic national convention philadelphia roar applause new yorker know con see one formerly republican independent bloomberg part greet warmly audience well fargo center arena throw support behind democrats presidential nominee hillary clinton owner bloomberg media empire former new york city mayor bloomberg odd choice speaker democratic conclave many party progressives rail influence billionaires politics let thank welcome outsider deliver unconventional convention speech say take stage elicit cheer member party one reason explain believe imperative elect hillary clinton next president unite state bloomberg consider run white house independent year drop idea march say could increase chance trump would win bloomberg know trump casually years twice appear trump reality tv show apprentice since trump enter race president june 2015 bloomberg take issue lash policies fiery rhetoric especially call ban muslims enter country promise wall mexican border deport millions undocumented foreigners wednesday go step favorably compare business record trump build business start million-dollar check father bloomberg say forbes list bloomberg 74 america sixth wealthy american fortune amount 47.7 billion trump 70 often boast extravagant wealth success real estate business list 113th 4.5 billion though figure widely challenge reuters review trump federal file show cash liquid investments worth 60 million 180 million may far short amount would need self-fund campaign clash billionaires bloomberg call trump white house race con