'We don't show enough respect for those (voters) who have been left behind'...'These voters aren't racist, they aren't sexist'
Biden admits that Donald Trump's message to working class voters cut through.
Jake Tapper asks Biden 'what if' he'd run in 2016 instead of Hillary
WATCH:
Biden admits that Donald Trump's message to working class voters cut through.
Jake Tapper asks Biden 'what if' he'd run in 2016 instead of Hillary
WATCH: