Why Sanders Hold Outs are a Problem for Clinton

“New data and analysis shared with FiveThirtyEight from Catalist and SurveyMonkey shows that, before the 2016 primaries, Sanders’s supporters voted less frequently than other 2016 voters, and they were less reliably Democratic than Clinton supporters. In other words, it’s not a matter of Clinton simply coaxing Sanders supporters back into the fold — many were never in the fold to begin with. That could increase the difficulty of the task facing Clinton.”