Here is something

Posted on: April 22, 2018 at 19:19:40 CT

I have long viewed the bromide I turned to above as well-established. Read the last sentence of this article. I post the link below.
When voters enter the electorate, still in their adolescence, their attachment to the political parties isn’t especially developed. They are less likely to think of themselves as strong Democrats or Republicans, and also less likely to see the world through that prism. That means that the political conditions at the time are especially important to the youngest voters. If the president in power is presiding over good times, young voters swing toward that party. As with presidential approval, good times are usually defined in terms of bread and peace: How is the economy? And if a war is being fought, how is it going? If those yardsticks suggest times are bad, a president is likely to be perceived as unsuccessful and to cost his party support. But what’s more unexpected is that voters stay with the party they identify with at age 18, developing an attachment that is likely to persist — and to shape how they see politics down the road."

https://fivethirtyeight.com/features/partisan-loyalty-begins-at-age-18/