538 refuses to address this obvious fact

After Sanders won Democratic Michigan primary against all the polls that had him considerably down, 538 offered every imaginable excuse. But they refused to address the one viable and obvious reason: these polls are not reaching Millennials. Millennials are the demographic that is significantly in favor of Sanders and the key demo that ensured the win in MI. And yet not a peep about this from 538. I can only wonder why they are ignoring this factor. Bottom line: Ignore the polls young people and do your civic duty and vote for your candidate!

In this video Maher addresses it during Overtime (starting a 9:15).