omaha neb billionaire investor warren buffett monday campaign alongside u.s. democratic presidential candidate hillary clinton rowdy rally home state nebraska challenge republican donald trump release tax return question trump business acumen trump new york real estate developer make first run public office say release tax return ritual u.s. presidential campaign internal revenue service complete audit get news say buffett whose berkshire hathaway brka.n conglomerate base omaha audit would delight meet anyplace anytime election bring tax return bring tax return ... let people ask us question items buffett add say trump afraid tax-collecting irs voters response trump spokeswoman hope hicks say know mr. trump undergo routine audit immediate comment ask respond buffett say audit would release tax return trump assert success businessman qualify lead country buffett back clinton nov. election say trump lose money time go american people ask invest say 1995 trump list trump hotels casino resort new york stock exchange say company lose money every year next decade monkey would outperform trump company buffett say 1995 monkey throw dart stock page monkey average would make 150 percent say buffett speak nearly 30 minutes raucous capacity crowd roughly 3,100 people suburban omaha high school clinton sit side say trump final straw abc interview broadcast sunday criticize muslim parent decorate u.s. soldier kill bomb iraq 12 years ago father khizr khan speak last week democratic national convention son attack trump propose temporary ban muslims enter unite state trump say viciously attack khan naturalize u.s. citizen father publicly doubt trump read u.s. constitution khan say trump sacrifice nothing prompt trump abc interview say think make lot sacrifice buffett monday bluntly contradict trump member buffett family go iraq afghanistan member trump family go iraq afghanistan buffett say do extremely well period families sacrifice anything remark buffett announce launch get-out-the vote effort pledge take least 10 people poll would otherwise difficulty get buffett say back website drive2vote would coordinate transportation cast vote reserve trolley seat 32 people purpose go day go selfies whatever take buffett say buffett say goal generate high voter turnout congressional district include omaha country nebraska one two u.s. state award electoral vote presidential elections congressional district clinton respond buffett pledge promise turnout goal meet warren dance streets omaha together maybe really lucky wear elvis costume say buffett rebuke trump question business skill