66% Democratic vote among 18-39 year olds is really, really bad for the future of the GOP. Think about 2020, with current 16-17 year olds eligible to vote and two more years worth of baby boomers gone ... Trumptards have a huge demographic problem. They're going to be an incredibly short-lived blip in history.
I have every confidence that the liberals will deliver whatever is needed to keep the GOP relevant for a very, very long time. They always do.