Hispanics help push Sanders to lead as Nevada caucus-goers' first choice: Edison Research Poll

U.S. Senator Bernie Sanders appears to have an early edge in the Nevada Democratic caucus with the largest share of initial support from Hispanics, union families and white college-educated women, according to polling agency Edison Research.Edison, which compiles voter polls and live election results for media organizations including ABC News, CBS News, CNN, NBC News and Reuters, said its polling of early voters and state caucus-goers shows Sanders "leads in the first preference" vote.Nevada wil