Will white Millennials become more Republican when they're middle aged?

[Virginiá]

Griff's argument that current non-voters joining the electorate later in life will probably bring more balance to the electorate for Republicans of the future sounds pretty reasonable.

I think if Democrats lose any Millennials later in life, it would be mostly due to them currently have such a large majority with that demographic already. When you're regularly pulling in 60 - 67% of the 18-29 vote, you're bound to lose some of them eventually, considering not all of them were ever "locked in" to the party to begin with. So a noticeable shift to the Republicans would be far more likely due to Democrats being "too successful" than any "people get more conservative as they age" BS theory.