warren buffett one rich people world third list accord forbes recent rank back hillary clinton president unite state buffett appear clinton campaign event monday take aim donald trump.buffett campaign behalf democratic presidential nominee hillary clinton challenge trump meet place time copy tax return buffett say would bring return two would answer question public dismiss trump contention release audit buffett say return examine internal revenue service well afraid get something afraid buffett tell cheer crowd omaha afraid irs afraid impossible verify trump claim wealth investor buffett often describe oracle omaha well document fortune estimate 60.8 billion dollars also unlike trump buffett know live relatively humble life style someone sort rent live relatively modest home nebraska gold plat trade 2006 car 2014 cadillac.buffett third well-known billionaire come support clinton bash trump former new york city mayor michael bloomberg endorse clinton democratic convention dallas mavericks owner mark cuban praise clinton pennsylvania rally call trump jagoff trump claim worth 10 billion dollars offer documentation prove net worth show tax payments previous testimony trump show wildly change net worth sue author document investigation show trump worth several million among world billionaires.featured image via youtube meet real billionaire take trump woodshed video